.Demʹi͡anov, V. F., .Rubinov, A. M., & .Kranc, G. M. (1970). Approximate methods in optimization problems (2th. ed.). American Elsevier Pub. Co..
Cita Chicago (17th ed.).Demʹi͡anov, Vladimir F., Aleksandr M. .Rubinov, i George M. .Kranc. Approximate Methods in Optimization Problems. 2th. ed. New York: American Elsevier Pub. Co., 1970.
Cita MLA (9th ed.).Demʹi͡anov, Vladimir F., et al. Approximate Methods in Optimization Problems. 2th. ed. American Elsevier Pub. Co., 1970.