Properties of the Nonoscillatory Solution for a Third Order Nonlinear Differential Equation Jozef Eliáš — 1970 Matematický časopis
On the solutions of n -th order nonlinear differential equation in L 2 ( 0 , ∞ ) Jozef Eliáš — 1982 Mathematica Slovaca
A note on the differential equation y ( n ) ( x ) + f ( x ) y α ( x ) = 0 , 0 < α < 1 Jozef Eliáš — 1984 Mathematica Slovaca