@article{PismaZhETF.44.481,
    title = {Evolution of perturbations in an inflationary universe},
    author = {Kofman, L. A. and Mukhanov, V. F.},
    journal = {Письма в ЖЭТФ},
    volume = {44},
    issue = {11},
    pages = {481},
    year = {1986},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21195.shtml},
}