@article{PismaZhETF.33.292,
    title = {One- and two-loop invariants in expanded supergravitations},
    author = {Kallosh, R. E.},
    journal = {Письма в ЖЭТФ},
    volume = {33},
    issue = {5},
    pages = {292},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23010.shtml},
}