@article{PismaZhETF.51.349,
    title = {Experimental observation of type-B coherent photoproduction of $e^+e^-$ pairs in a crystal},
    author = {Avakyan, R. O. and Avetisyan, A. E. and Gyurdzhyan, V. A. and Dallakyan, K. R. and Danagulyan, S. S. and Darbinyan, S. M. and Ispiryan, K. A. and Kizogyan, O. S. and Margaryan, A. T. and Sukiasyan, Yu. Z. and Taroyan, S. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {51},
    issue = {7},
    pages = {349},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17270.shtml},
}