Stephani, H., MacCallum, M. A. H., & MacCallum, M. (1989). Differential equations: Their solution using symmetries. Cambridge [England] New York: Cambridge University Press.
Παραπομπή Chicago StyleStephani, Hans, M. A. H. MacCallum, and Malcolm MacCallum. Differential Equations: Their Solution Using Symmetries. Cambridge [England] New York: Cambridge University Press, 1989.
Παραπομπή MLAStephani, Hans, M. A. H. MacCallum, and Malcolm MacCallum. Differential Equations: Their Solution Using Symmetries. Cambridge [England] New York: Cambridge University Press, 1989.
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