@article{PismaZhETF.25.272,
    title = {Topology of gauge fields with several vacuums},
    author = {Golo, V. L. and Monastyrskii, M. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {25},
    issue = {5},
    pages = {272},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21147.shtml},
}