@article{PismaZhETF.32.182,
    title = {Hidden symmetry of integrable systems},
    author = {Belavin, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {32},
    issue = {2},
    pages = {182},
    year = {1980},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21665.shtml},
}