TY - JOUR AU - S. V. Maleev TI - Analytic continuation of temperature-dependent diagrams and unitarity conditions at finite temperatures JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1970 SP - 86 EP - 100 VL - 4 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1970_4_1_a10/ LA - ru ID - TMF_1970_4_1_a10 ER -