Boyce, W. E. (1986). Elementary differential equations (4th.). Wiley & Sons.
Chicago-čujuhus (17. p.)Boyce, William E. Elementary Differential Equations. 4th. USA: Wiley & Sons, 1986.
MLA-čujuhus (9. p.)Boyce, William E. Elementary Differential Equations. 4th. Wiley & Sons, 1986.
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