@article{PismaZhETF.11.75,
    title = {Regeneration of $K^0$ Mesons and the Pomeranchuk Theorem},
    author = {Gershtein, S. S. and Kobzarev, I. Yu. and Okun', L. B.},
    journal = {Письма в ЖЭТФ},
    volume = {11},
    issue = {1},
    pages = {75},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26061.shtml},
}