Παραπομπή APA

Ovsiannikov, L. V. (1982). Group analysis of differential equations. Academic Press.

Παραπομπή Chicago Style

Ovsiannikov, L V. Group Analysis of Differential Equations. New York: Academic Press, 1982.

Παραπομπή MLA

Ovsiannikov, L V. Group Analysis of Differential Equations. Academic Press, 1982.