TY - RPRT TI - Erratum: Mass-derivative formula and the singularity structure in thermo field dynamics AU - Y Fujimoto AU - H Matsumoto AU - H Umezawa AU - I Ojima PY - 1985 DO - 10.1103/physrevd.31.1527 UR - https://pubmed.ncbi.nlm.nih.gov/9955869/ ID - 9955869 ER -