TY - JOUR AU - Yu. M. Shirokov TI - Covariant expansions for field commutators at an equal-time point JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1975 SP - 228 EP - 235 VL - 135 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1975_135_a28/ LA - ru ID - TM_1975_135_a28 ER -