TY - JOUR AU - B. M. Levitan TI - Differentiation of an expansion in eigenfunctions of the Schr\"odinger equation JO - Trudy Moskovskogo matematičeskogo obŝestva PY - 1958 SP - 269 EP - 290 VL - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MMO_1958_7_a6/ LA - ru ID - MMO_1958_7_a6 ER -