@article{PismaZhETF.29.614,
    title = {Observation of the cooling of free sodium atoms in a resonance laser field  with a scanning frequency},
    author = {Balykin, V. I. and Letokhov, V. S. and Mushin, V. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {10},
    pages = {614},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22182.shtml},
}