@article{PismaZhETF.66.620,
    title = {Zero curvature representation for classical lattice sine-Gordon model via quantum $R$-matrix},
    author = {Zabrodin, A. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {66},
    issue = {9},
    pages = {620},
    year = {1997},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_15525.shtml},
}