Simmons, G. F. (2019). Differential equations with applications and historical notes (2nd.). McGraw hill.
Lua i Stíl Chicago (17ú heag.)Simmons, George F. Differential Equations with Applications and Historical Notes. 2nd. New York: McGraw hill, 2019.
Lua MLA (9ú heag.)Simmons, George F. Differential Equations with Applications and Historical Notes. 2nd. McGraw hill, 2019.
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