@article{PismaZhETF.23.326,
    title = {Primordial gravitons and possibility of their observation},
    author = {Grishchuk, L. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {23},
    issue = {6},
    pages = {326},
    year = {1976},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27514.shtml},
}