@ARTICLE{Ovchar_Rayisa_weakly_2013,
 author={Ovchar, Rayisa},
 number={No 3},
 journal={MOTROL – Motoryzacja i Energetyka Rolnictwa},
 howpublished={online},
 year={2013},
 publisher={Oddział PAN w Lublinie},
 title={weakly nonlinear boundaty value problems for differential systemswith impulse action},
}