@article{PismaZhETF.51.259,
    title = {Второй (квантовый) порог лазера},
    author = {Ораевский, А. Н.},
    journal = {Письма в ЖЭТФ},
    volume = {51},
    issue = {5},
    pages = {259},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_3171.shtml},
}