Zernov AE, Kuzina YV. Qualitative Investigation of the Singular Cauchy Problem <em class="a-plus-plus">F</em>(<em class="a-plus-plus">t</em>, <em class="a-plus-plus">x</em>, <em class="a-plus-plus">x</em>′) = 0, <em class="a-plus-plus">x</em&gt;(0) = 0. Ukr. Mat. Zhurn. [Internet]. 2003Dec.25 [cited 2024Jul.27];55(12):1720-3. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4033