Ovsiannikov, L. V. (1982). Group analysis of differential equations. Academic Press.
استشهاد بنمط شيكاغوOvsiannikov, L V. Group Analysis of Differential Equations. New York: Academic Press, 1982.
MLA استشهادOvsiannikov, L V. Group Analysis of Differential Equations. Academic Press, 1982.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.