TY - JOUR AU - B. N. Biyarov TI - On Volterra relatively compact perturbations of the Laplace operator JO - Eurasian mathematical journal PY - 2014 SP - 135 EP - 140 VL - 5 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EMJ_2014_5_1_a5/ LA - en ID - EMJ_2014_5_1_a5 ER -