@article{PismaZhETF.21.223,
    title = {Effect of viscosity on the character of the cosmological singularity},
    author = {Belinskii, V. A. and Khalatnikov, I. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {21},
    issue = {4},
    pages = {223},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22291.shtml},
}