Zill, D. G., & Ross, S. L. (1986). Differential Equations: With boundary-value problems (3rd ed.). PWS-Kent Pub. Co..
Citace podle Chicago (17th ed.)Zill, Dennis G., a Shepley L. Ross. Differential Equations: With Boundary-value Problems. 3rd ed. Boston: PWS-Kent Pub. Co., 1986.
Citace podle MLA (9th ed.)Zill, Dennis G., a Shepley L. Ross. Differential Equations: With Boundary-value Problems. 3rd ed. PWS-Kent Pub. Co., 1986.
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