@article{PismaZhETF.45.526,
    title = {$\pi$ K dimesonic atom},
    author = {Efimov, G. V. and Ivanov, M. A. and Lyubovitskii, V. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {45},
    issue = {11},
    pages = {526},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18847.shtml},
}