@article{PismaZhETF.39.202,
    title = {Renormalization of topological charge},
    author = {Knizhnik, V. G. and Morozov, A. Yu.},
    journal = {Письма в ЖЭТФ},
    volume = {39},
    issue = {5},
    pages = {202},
    year = {1984},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19456.shtml},
}