Simmons, G. F. (1972). Differential equations with applications and historical notes. New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleSimmons, George F. Differential Equations With Applications and Historical Notes. New York: McGraw-Hill Book Company, 1972.
Παραπομπή MLASimmons, George F. Differential Equations With Applications and Historical Notes. New York: McGraw-Hill Book Company, 1972.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.