Author: Ukpera, Awar Simon

Ukpera, Awar Simon; Adesina, Olufemi Adeyinka: Results on Non-resonant Oscillations for some Nonlinear Vector Fourth Order Differential Systems. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 51 (2012), issue 2, pp. 129-140
Ukpera, Awar Simon: Further results for some third order differential systems with nonlinear dissipation. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 43 (2004), issue 1, pp. 155-169
Ukpera, Awar Simon: Periodic solutions of certain third order differential systems with nonlinear dissipation. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 41 (2002), issue 1, pp. 147-159

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