Colin Campbell's publications since 1995

• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Reidemeister-Schreier type rewriting for semigroups, Semigroup Forum 51 (1995), 47-62.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Semigroup and group presentations, Bull. London Math. Soc. 27 (1995) , 46-50.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) On semigroups defined by Coxeter type presentations, Proc. Roy. Soc. Edinburgh 125A (1995), 1063-1075.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Rewriting a semigroup presentation, Internat. J. Algebra Comput. 5 ( 1995), 81-103.
• (with E. F. Robertson, N. Ruskuc, R. M. Thomas & Y. Unlu) Certain one relator products of semigroups, Comm. Algebra 23 (1995), 5207- 5219.
• (with M. J. Brookes & E. F. Robertson) Efficiency and direct products of groups, Groups-Korea '94, Walter de Gruyter, (Berlin - New York, 1995), 25-33.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) On subsemigroups of finitely presented semigroups, J. Algebra 180 (1996), 1-21.
• (with D. M. Gill) On the infiniteness of the Fibonacci group F(5,7), Algebra Colloq. 3 (1996), 283-284.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) On subsemigroups and ideals in free products of semigroups, Internat. J. Algebra Comput. 6 (1996), 571-591.
• (with E. F. Robertson & P. D. Williams) Efficient presentations for direct powers of imperfect groups, Algebra Colloq. 4 (1997) , 21-27.
• (with I. Miyamoto, E. F. Robertson & P. D. Williams) Efficient presentations for PSL(2,p)^3 and other direct products of groups, Glasgow Math. J. 39 (1997), 259-268.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Presentations for subsemigroups - applications to ideals of semigroups, J. Pure Appl. Algebra 124 (1998), 47-64.
• (with G. Havas, S. A. Linton & E. F. Robertson) Symmetric presentations and orthogonal groups, Proc. ATLAS 10 years on, Cambridge University Press, (Cambridge, 1998), 1-10.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Groups, semigroups and finite presentations, Geometric Group Theory Down Under, Walter de Gruyter, (Berlin New York, 1999), 55-69.
• (with H. Ayik, J. J. O'Connor & N. Ruskuc) Minimal presentations and efficiency of semigroups, Semigroup Forum 60 (2000), 231-242.
• (with H. Ayik, J. J. O'Connor & N. Ruskuc) On the efficiency of wreath products of groups, Proc. Groups Korea '98, Walter de Gruyter, (Berlin New York, 2000), 39-51.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Direct products of automatic semigroups, J. Austral. Math. Soc. 69 (2000), 19-24.
• (with H. Ayik, J. J. O'Connor & N. Ruskuc) The semigroup efficiency of groups and monoids, Proc. Roy. Irish Acad. Sect. A 100A (2000), 171-176.
• (with H. Doostie) Fibonacci length of automorphism groups involving Tribonacci numbers, Vietnam J. Math. 28 (2000), 57-66.
• (with H. Ayik, J.J. O'Connor & N. Ruskuc) On the efficiency of finite simple semigroups, Turkish J. Math. 24 (2000), 129-146.
• (with H. Ayik, J.J. O'Connor & N. Ruskuc) The semigroup efficiency of direct powers of groups, Proc. Internat. Conf. on Semigroups, Braga, Portugal 18-23 June 1999, World Scientific, (Singapore, 2000), 19-25.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Automatic semigroups, Theoret. Comput. Sci. 250 (2001), 365-391.
• (with G. Havas, J. A. Hulpke & E. F. Robertson) Efficient simple groups, Comm. Algebra 30 (2002), 971-975 and 31 (2003), 5191-5197.
• (with J. D. Mitchell & N. Ruskuc) Comparing semigroup and monoid presentations for finite monoids, Monatshefte fuer Mathematik 134 (2002), 287-293.
• (with E. F. Robertson, N. Ruskuc & R. M. Thomas) Automatic completely-simple semigroups, Acta Math. Hungar. 96 (2002), 201-215.
• (with J .D. Mitchell & N. Ruskuc) On defining groups efficiently without using inverses, Math. Proc. Cambridge Philos. Soc. 133 (2002), 31-36.
• (with J. D. Mitchell & N. Ruskuc) On the efficiency and deficiency of Rees matrix semigroups, Semigroups, Algorithms, Automata and Languages, World Scientific, (Singapore, 2002), 331-339.
• (with P. P. Campbell, B. T. K. Hopson & E. F. Robertson) On the efficiency of direct powers of PGL(2,p), Recent Advances in Group Theory and Low-Dimensional Topology, Heldermann (2003), 27-34.
• (with E. F. Robertson & G. C. Smith)(editors) Groups St Andrews 2001 in Oxford, Volume 1, London Mathematical Society Lecture Notes in Mathematics 304 , Cambridge University Press, (Cambridge, 2003).
• (with E. F. Robertson & G. C. Smith)(editors) Groups St Andrews 2001 in Oxford, Volume 2, London Mathematical Society Lecture Notes in Mathematics 305 , Cambridge University Press, (Cambridge, 2003).
• (with P. P. Campbell, H. Doostie & E. F. Robertson) On the Fibonacci length of powers of dihedral groups, Applications of Fibonacci Numbers 9, Kluwer, (Dordrecht, 2004), 69-85.
• (with P. P. Campbell, H. Doostie & E. F. Robertson) Fibonacci lengths for certain metacyclic groups, Algebra Colloq. 11 (2004), 215-222.
• (with G. Havas, C. Ramsay and E. F. Robertson) Nice efficient presentations for all small simple groups and their covers, LMS J. Comput. Math. 7 (2004), 266-283.
• (with P. P. Campbell) On the minimal length of semigroup presentations, Novi Sad J. Math. 34 (2004), 17-26.
• (with P. P. Campbell) The Fibonacci length of certain centro-polyhedral groups, J. Appl. Math. & Computing 19 (2005), 231-240.
• (with P. P. Campbell) Search techniques and epimorphisms between certain groups and Fibonacci groups, Irish Math. Soc. Bull. 56 (2005), 21-28.
• (with P. P. Campbell) The Fibonacci lengths of binary polyhedral groups and related groups, Applications of Fibonacci Numbers 10 , Kluwer, (Dordrecht, 2006), 83-91.
• (with H. Ayik & J. J. O'Connor) On the efficiency of the direct products of monogenic monoids, Algebra Colloq. 14 (2007), 279-284.
• (with M. R. Quick, E. F. Robertson & G. C. Smith)(editors) Groups St Andrews 2005, Volume 1, London Mathematical Society Lecture Notes in Mathematics 339 , Cambridge University Press, (Cambridge, 2007).
• (with M. R. Quick, E. F. Robertson & G. C. Smith)(editors) Groups St Andrews 2005, Volume 2, London Mathematical Society Lecture Notes in Mathematics 340 , Cambridge University Press, (Cambridge, 2007).
• (with E. F. Robertson)(editors) Groups-St Andrews 1981 (new edition), London Mathematical Society Lecture Notes in Mathematics 71 , Cambridge University Press, (Cambridge, 2007).
• (with G. Havas & E. F. Robertson) Addendum to an elementary introduction to coset table methods in computational group theory Groups-St Andrews 1981 (new addition), London Mathematical Society Lecture Notes in Mathematics 71 , Cambridge University Press, (Cambridge, 2007).
• (with G. Havas, C. Ramsay & E. F. Robertson) On the efficiency of the simple groups with order less than a million and their covers, Experiment. Math. 16 (2007), 347-358.
• (with P. P. Campbell) The Fibonacci length of binary polyhedral groups and related groups, Congressus Numerantium 194 (2009), 95-102.
• (with K. Ahmadidelir & H. Doostie) Two classes of finite semigroups and monoids involving Lucas numbers, Semigroup Forum 78 (2009), 200-209.
• (with Omur Deveci, Erdal Karaduman & Sait Tas) k-nacci sequences in minimal non-abelian p-groups, Indian J. Math. 52 (2010), 275-286.
• (with Omur Deveci & Erdal Karaduman) The periods of k-nacci sequences in centro-polyhedral and related groups, Ars Combinatoria 97 (2010), 193-210.
• (with M. R. Quick, E. F. Robertson, C. M. Roney-Dougal, G. C. Smith & G. Traustason)(editors) Groups St Andrews 2009 in Bath, Volume 1, London Mathematical Society Lecture Notes in Mathematics 387 , Cambridge University Press, (Cambridge, 2011).
• (with M. R. Quick, E. F. Robertson, C. M. Roney-Dougal, G. C. Smith & G. Traustason)(editors) Groups St Andrews 2009 in Bath, Volume 2, London Mathematical Society Lecture Notes in Mathematics 388 , Cambridge University Press, (Cambridge, 2011).
• (with K. Ahmadidelir & H. Doostie) Almost commutative semigroups, Algebra Colloq., to appear.
• (with Ö. Deveci & E. Karaduman) On the k-nacci sequences in finite binary polyhedral groups, Algebra Colloq., to appear.