TY - BOOK AU - Budnev, V. M. TI - Perturbation theory in the system with infinite momentum T2 - Препринт VL - ТФ-43 PY - 1968/// CY - Novosibirsk KW - Фз-125[В319, 0] KW - rubbk N2 - Библиогр.: с. 9 ER -