Greguš, M.: On the third order nonlinear ordinary differential equation.
(English).
In:
Kurzweil, Jaroslav (ed.): Equadiff 7.
Proceedings of the 7th Czechoslovak Conference on Differential Equations and Their Applications held in Prague, 1989.
BSB B.G. Teubner Verlagsgesellschaft, Leipzig, 1990.
pp. 80-83
Greguš, M.: On linear differential equations of higher odd order.
(English).
In:
Šeda, Valter (ed.): Differential Equations and Their Applications.
Proceedings of the Conference held in Bratislava in September 1966.
Slovenské pedagogické nakladateľstvo, Bratislava, 1967.
pp. 81-88