WRIGHT, W. S. (2001). A first course in differential equations: The classic fifth edition. Brooks Cole.
Lua i Stíl Chicago (17ú heag.)WRIGHT, Warren S. A First Course in Differential Equations: The Classic Fifth Edition. Brooks Cole, 2001.
Lua MLA (9ú heag.)WRIGHT, Warren S. A First Course in Differential Equations: The Classic Fifth Edition. Brooks Cole, 2001.
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