TY - JOUR AU - Yu. G. Shondin TI - About semiboundness of $\delta$-perturbations of the Laplacian supported by curves with angle points JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1995 SP - 3 EP - 17 VL - 105 IS - 1 UR - http://geodesic.mathdoc.fr/item/TMF_1995_105_1_a0/ LA - ru ID - TMF_1995_105_1_a0 ER -