PACS:05.70.Fh DOI:10.1070/PU1973v016n03ABEH005187 URL: https://ufn.ru/en/articles/1973/3/e/ Citation: Mikulinskii M A "Effect of small perturbations on the behavior of thermodynamics quantities near a second-order phase transition point" Sov. Phys. Usp.16 361–380 (1973)