Feltrin, G. (2018). Positive Solutions to Indefinite Problems: A Topological Approach (1st ed. 2018.). Springer International Publishing.
Citace podle Chicago (17th ed.)Feltrin, Guglielmo. Positive Solutions to Indefinite Problems: A Topological Approach. 1st ed. 2018. Cham: Springer International Publishing, 2018.
Citace podle MLA (9th ed.)Feltrin, Guglielmo. Positive Solutions to Indefinite Problems: A Topological Approach. 1st ed. 2018. Springer International Publishing, 2018.
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