Szerző: " Graef J. R."

Karsai János; Graef J. R.: Behavior of solutions of second-order differential equations with sublinear damping.
NONLINEAR OSCILLATIONS, 8 (2). pp. 186-200. ISSN 1536-0059 (2005)

Graef J. R.; Karsai János: Asymptotic Properties of Nonoscillatory Solutions of Impulsively Damped Nonlinear Oscillator Equations.
DYNAMICS OF CONTINUOUS DISCRETE AND IMPULSIVE SYSTEMS-SERIES A-MATHEMATICAL, 3 (2). pp. 151-165. ISSN 1201-3390 (1997)

Graef J. R.; Karsai János: On Irregular Growth and Impulse Effects in Oscillator Equations.
In: Advances in difference equations. Gordon & Breach Publishing Group; Gordon and Breach Publisher, Amsterdam, pp. 253-262. (1997) ISBN 9056995219