Citazione Stile APA (7a Edizione)

Erugin, N. P. (1966). Linear systems of ordinary differential equations with periodic and quasi-periodic coefficients. Academic Press.

Citazione stile Chigago Style (17a edizione)

Erugin, Nikolay P. Linear Systems of Ordinary Differential Equations with Periodic and Quasi-periodic Coefficients. Nueva York: Academic Press, 1966.

Citatione MLA (9a ed.)

Erugin, Nikolay P. Linear Systems of Ordinary Differential Equations with Periodic and Quasi-periodic Coefficients. Academic Press, 1966.