References for Juan de Ortega

1. M A Catala, Biography in Dictionary of Scientific Biography (New York 1970-1990).
   http://www.encyclopedia.com/doc/1G2-2830903241.html

Articles:

2. C P Calderón, The 16th-century Iberian calculatores, Rev. Un. Mat. Argentina 35 (1989), 245-258
3. M Cantor, Vorlesungen über Geschichte der Mathematik II (Leipzig, 1908), 388.
4. J Ray Pastor, Los matematicos expanoles del siglo XVI, Biblioteca scientia 2 (1926), 67.
5. J Sesiano, On an algorithm for the approximation of surds from a Provençal treatise, in Mathematics from manuscript to print, 1300--1600, Oxford, 1984 (Oxford Univ. Press, Oxford, 1988), 30-55.

August 2006