Ráb, M.; Kalas, J.: Stability and asymptotic properties of dynamical systems in the plane.
(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. 103-105
Ráb, M.: Asymptotic formulas for the solutions of the equation (py')' + qy = 0.
(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. 217-220