Troutman, J. L., & Hrusa, W. (1983). Variational calculus with elementary convexity. Springer.
Chicago Style (17th ed.) CitationTroutman, John L., and William Hrusa. Variational Calculus with Elementary Convexity. New York: Springer, 1983.
MLA (9th ed.) CitationTroutman, John L., and William Hrusa. Variational Calculus with Elementary Convexity. Springer, 1983.