Nemytskii, V. V., & Stepanov, V. V. (1960). Qualitative theory of differential equations. Princeton, NJ: Princeton University Press.
Παραπομπή Chicago StyleNemytskii, V. V., and V. V. Stepanov. Qualitative Theory of Differential Equations. Princeton, NJ: Princeton University Press, 1960.
Παραπομπή MLANemytskii, V. V., and V. V. Stepanov. Qualitative Theory of Differential Equations. Princeton, NJ: Princeton University Press, 1960.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.