@article{PismaZhETF.19.571,
    title = {Natural laser-beam spatial coherence determined by spontaneous emission},
    author = {Arakelyan, S. M. and Akhmanov, S. A. and Tunkin, V. G. and Chirkin, A. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {19},
    issue = {9},
    pages = {571},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27088.shtml},
}