Παραπομπή APA

Stephani, H. (1989). Differential equations: Their solution using symmetries. Cambridge University Press.

Παραπομπή Chicago Style

Stephani, Hans. Differential Equations: Their Solution Using Symmetries. Cambridge [England] ; New York: Cambridge University Press, 1989.

Παραπομπή MLA

Stephani, Hans. Differential Equations: Their Solution Using Symmetries. Cambridge University Press, 1989.