TY - JOUR AU - T. R. Gadyl'shin AU - F. Kh. Mukminov TI - Perturbation of second order nonlinear equation by delta-like potential JO - Ufa mathematical journal PY - 2018 SP - 31 EP - 43 VL - 10 IS - 2 UR - http://geodesic.mathdoc.fr/item/UFA_2018_10_2_a2/ LA - en ID - UFA_2018_10_2_a2 ER -