Goursat, E., & Bergmann, H. G. (1964). Integral equations calculus of variations. Dover.
Chicago Style (17th ed.) CitationGoursat, Edouard, and Howard G. Bergmann. Integral Equations Calculus of Variations. New York: Dover, 1964.
MLA (9th ed.) CitationGoursat, Edouard, and Howard G. Bergmann. Integral Equations Calculus of Variations. Dover, 1964.
Warning: These citations may not always be 100% accurate.