Derrick, W. R., & Grossman, S. I. (1997). Elementary differential equations (4th ed.). Addison-Wesley.
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Chicago-čujuhus (17. p.)
Derrick, William R., juo Stanley I. Grossman. Elementary Differential Equations. 4th ed. Reading, Mass.: Addison-Wesley, 1997.
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MLA-čujuhus (9. p.)
Derrick, William R., juo Stanley I. Grossman. Elementary Differential Equations. 4th ed. Addison-Wesley, 1997.
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