APA-viite (7. p.)
Stephani, H., & MacCallum, M. Differential Equations: Their Solution using Symmetries. Cambridge University.
Chicago-viite (17. p.)
Stephani, Hans, ja Malcolm MacCallum. Differential Equations: Their Solution Using Symmetries. Cambridge, Inglaterra: Cambridge University.
MLA-viite (9. p.)
Stephani, Hans, ja Malcolm MacCallum. Differential Equations: Their Solution Using Symmetries. Cambridge University.
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