TY - JOUR AU - D. R. Yafaev TI - The virial theorem and conditions for wave operators to be unitary in scattering by a~nonstationary potential JO - Informatics and Automation PY - 1983 SP - 210 EP - 217 VL - 159 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1983_159_a13/ LA - ru ID - TRSPY_1983_159_a13 ER -