@article{PismaZhETF.15.401,
    title = {Observation of fine Structure Within the Limits of Homogeneous Line Width},
    author = {Vdovin, Yu. A. and Ermachenko, V. M. and Popov, A. I. and Protsenko, E. D.},
    journal = {Письма в ЖЭТФ},
    volume = {15},
    issue = {7},
    pages = {401},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26604.shtml},
}