@article{PismaZhETF.6.622,
    title = {Contraction of Positive Column},
    author = {Baranov, V. Yu. and Ul'yanov, K. N},
    journal = {Письма в ЖЭТФ},
    volume = {6},
    issue = {5},
    pages = {622},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25438.shtml},
}