Carathéodory, C. (1965). Calculus of variations and partial differential equations of the first order. San Francisco CA: Holden-Day.
Чикагска система за цитиранеCarathéodory, Constantin. Calculus of Variations and Partial Differential Equations of the First Order. San Francisco CA: Holden-Day, 1965.
MLA формат за цитиранеCarathéodory, Constantin. Calculus of Variations and Partial Differential Equations of the First Order. San Francisco CA: Holden-Day, 1965.
Внимание: Тези цитати може да не са 100% точни.