TY - JOUR AU - M. R. Sayapova AU - D. R. Yafaev TI - The evolution operator for time-dependent potentials of zero radius JO - Informatics and Automation PY - 1983 SP - 167 EP - 174 VL - 159 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1983_159_a10/ LA - ru ID - TRSPY_1983_159_a10 ER -