@article{PismaZhETF.6.675,
    title = {High-coherence Ruby Laser with Dif fraction Divergence},
    author = {Mikaelyan, A. L. and Turkov, Yu. G. and Savel'ev, V. G.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {6},
    issue = {6},
    pages = {675},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25453.shtml},
}