Erugin, N. P. (1966). Linear systems of ordinary differential equations with periodic and quasi-periodic coefficients. Academic Press.
Citace podle Chicago (17th ed.)Erugin, Nikolay P. Linear Systems of Ordinary Differential Equations with Periodic and Quasi-periodic Coefficients. Nueva York: Academic Press, 1966.
Citace podle MLA (9th ed.)Erugin, Nikolay P. Linear Systems of Ordinary Differential Equations with Periodic and Quasi-periodic Coefficients. Academic Press, 1966.
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