Não informado. (1988). Differential and integral equations. Ohio University, Department of Mathematics.
Citação do estilo Chicago (17ª ed.)Não informado. Differential and Integral Equations. Athens, Ohio: Ohio University, Department of Mathematics, 1988.
Citação MLA (8ª ed.)Não informado. Differential and Integral Equations. Ohio University, Department of Mathematics, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.