@article{PismaZhETF.17.633, title = {Self-Consistency Conditions in Systems with Broken Symmetry}, author = {Fayans, S. A. and Khodel', V. A.}, journal = {πΙΣΨΝΑ Χ φότζ}, volume = {17}, issue = {11}, pages = {633}, year = {1973}, doi = {}, url = {http://jetpletters.ru/ps/0/article_23867.shtml}, }