APA

PETROV J. P., . (1968). Variational metods in optimum control theory. New York: Academic Press.

Chicago

PETROV Ju P, . 1968. Variational metods in optimum control theory. New York: Academic Press.

Harvard

PETROV J. P., . (1968). Variational metods in optimum control theory. New York: Academic Press.

MLA

PETROV Ju P, . Variational metods in optimum control theory. New York: Academic Press. 1968.