Ovsiannikov, L. V. (1982). Group analysis of differential equations. Academic Press.
Chicago Style (17th ed.) CitationOvsiannikov, Lev Vasilʹevich. Group Analysis of Differential Equations. New York: Academic Press, 1982.
MLA (9th ed.) CitationOvsiannikov, Lev Vasilʹevich. Group Analysis of Differential Equations. Academic Press, 1982.