@article{PismaZhETF.6.672,
    title = {Nonlinearity of Media Due to Induced Deformation of Molecules, Atoms, and Particles of a Medium},
    author = {Askar'yan, G. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {6},
    issue = {5},
    pages = {672},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25452.shtml},
}