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Olexandr Е. Zernov

A geometric analysis of a singular initial value problem: O. Е. Zernov and Y. V. Kuzina; Volume 7, No.1, pp. 67-80; Link PDF
A singular Cauchy problem for an ordinary differential equation not solved with respect to the derivative of the unknown function: O. Е. Zernov and Y. V. Kuzina; Volume 20, No.2, pp. 166-183; Link PDF
Existence and asymptotic behavior of solutions of the Cauchy problem $x(x^\prime)^\gamma=f(t,x,x^\prime)$ , $x(0)=0$: O. Е. Zernov and Y. V. Kuzina; Volume 6, No.2, pp. 178-190; Link PDF