PACS:11.30.Qc, 11.30.Er, 11.10.−z, 75.10.Jm, 05.30.Jp (all) DOI:10.1070/PU1971v013n06ABEH004282 URL: https://ufn.ru/en/articles/1971/6/g/ Citation: Grib A A, Damaskinskii E V, Maksimov V M "The problem of symmetry breaking and in variance of the vacuum in quantum field theory" Sov. Phys. Usp.13 798–815 (1971)