Zill, D. G. (2001). Differential Equations: With boundary-value problems (5th ed.). Brooks/Cole.
Citace podle Chicago (17th ed.)Zill, Dennis G. Differential Equations: With Boundary-value Problems. 5th ed. Pacific Grove: Brooks/Cole, 2001.
Citace podle MLA (9th ed.)Zill, Dennis G. Differential Equations: With Boundary-value Problems. 5th ed. Brooks/Cole, 2001.
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