TY - JOUR AU - G. V. Ryazanov TI - Two-sided estimates for eigenvalues of the Schrödinger equation JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1975 SP - 412 EP - 418 VL - 24 IS - 3 UR - http://geodesic.mathdoc.fr/item/TMF_1975_24_3_a12/ LA - ru ID - TMF_1975_24_3_a12 ER -