Lefschetz, S. (1962). Differential equations: Geometric theory (2nd edition.). Interscience publishers.
Čikaški stil citiranja (17. izdanje)Lefschetz, Solomon. Differential Equations: Geometric Theory. 2nd edition. New York ; London: Interscience publishers, 1962.
MLA način citiranja (8. izdanje)Lefschetz, Solomon. Differential Equations: Geometric Theory. 2nd edition. Interscience publishers, 1962.
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