EvtukhovV. M. and SamoilenkoA. M. (2010) “Conditions for the existence of solutions of real nonautonomous systems of quasilinear differential equations vanishing at a singular point”, Ukrains’kyi Matematychnyi Zhurnal, 62(1), pp. 52 - 80. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2843 (Accessed: 23November2024).