Zernov AE. Qualitative Investigation of the Singular Cauchy Problem $\sum\limits_{k = 1}^n {(a_{k1} t + a_{k2} x)(x’)^k = b_1 t + b_2 x + f(t,x,x’),x(0) = 0}$. Ukr. Mat. Zhurn. [Internet]. 2003Oct.25 [cited 2024Nov.24];55(10):1419-24. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4010