A Guide to the Emil Grosswald Papers - Held at the Archives of American Mathematics, Center for American History, University of Texas at Austin. - http://www.lib.utexas.edu/taro/utcah/00224/cah-00224.html
Fermat's Little Theorem - Historical comments by John Cosgrave. - http://www.spd.dcu.ie/johnbcos/fermat's_little_theorem.htm