Não informado. (1996). Advances in Differential Equations. Khayyam.
Lua i Stíl Chicago (17ú heag.)Não informado. Advances in Differential Equations. Athens, Ohio: Khayyam, 1996.
Lua MLA (8ú heag.)Não informado. Advances in Differential Equations. Khayyam, 1996.
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