@article{PismaZhETF.38.489,
    title = {Solution of the Kondo problem for an orbital singlet},
    author = {Wiegmann, P. B. and Tsvelik, A. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {38},
    issue = {10},
    pages = {489},
    year = {1983},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22678.shtml},
}