Boyce William E. (2015). Elementary Differential Equations and Boundary Value Problems (9.). Wiley.
Chicago-viite (17. p.)Boyce William E. Elementary Differential Equations and Boundary Value Problems. 9. New Delhi: Wiley, 2015.
MLA-viite (9. p.)Boyce William E. Elementary Differential Equations and Boundary Value Problems. 9. Wiley, 2015.
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