Boyce, W. E., & DiPrima, R. C. Elementary differential equations (Ninth edition.). Wiley.
Chicago-čujuhus (17. p.)Boyce, William E., juo Richard C. DiPrima. Elementary Differential Equations. Ninth edition. Hoboken: Wiley.
MLA-čujuhus (9. p.)Boyce, William E., juo Richard C. DiPrima. Elementary Differential Equations. Ninth edition. Wiley.
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