@article{PismaZhETF.16.25,
    title = {Conservation of Wave Front in Strongly Deformed Solid Media},
    author = {Mikaelyan, A. L. and D'yachenko, V. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {16},
    issue = {1},
    pages = {25},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26718.shtml},
}