O Sushchestvovanii Reshenii Singulyarnoi Zadachi Koshi Dlya Sistem Differentsial'nyh Uravnenii ne Razreshennyh Otnositel'no Proizvodnyh Jozef Diblik — 1985 Publications de l'Institut Mathématique
On the existence of solutions of the singular Cauchy problem for systems of differential equations not solved with respect to the derivatives. Diblík, Jozef — 1985 Publications de l'Institut Mathématique. Nouvelle Série