Petryshyn, W. V. (1993). Approximation solvability of nonlinear funcional and diferential equations. Marcel Dekker.
Chicago-viite (17. p.)Petryshyn, Wolodymyr V. Approximation Solvability of Nonlinear Funcional and Diferential Equations. Nueva York: Marcel Dekker, 1993.
MLA-viite (9. p.)Petryshyn, Wolodymyr V. Approximation Solvability of Nonlinear Funcional and Diferential Equations. Marcel Dekker, 1993.
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