Não informado. (1988). Differential and integral equations. Ohio University, Department of Mathematics.
Lua i Stíl Chicago (17ú heag.)Não informado. Differential and Integral Equations. Athens, Ohio: Ohio University, Department of Mathematics, 1988.
Lua MLA (8ú heag.)Não informado. Differential and Integral Equations. Ohio University, Department of Mathematics, 1988.
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