Kumar, R., & Kumar,Nagendra. (2013). Differential equations and calculus of variations. CBS.
Chicago-стиль цитированияKumar, Rakesh, and Kumar,Nagendra. Differential Equations and Calculus of Variations. New Delhi: CBS, 2013.
MLA-цитированиеKumar, Rakesh, and Kumar,Nagendra. Differential Equations and Calculus of Variations. CBS, 2013.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.