@article{PismaZhETF.21.96,
    title = {Effect of $\pi$ condensate on the real part of the optical potential in a $\pi$-mesic atom},
    author = {Troitskii, M. A. and Sapershtein, E. E. and Markin, O. A. and Mishustin, I. N.},
    journal = {Письма в ЖЭТФ},
    volume = {21},
    issue = {1},
    pages = {96},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22242.shtml},
}