@article{PismaZhETF.32.217,
    title = {Observation of second-sound-rarefaction shock waves in superfluid helium},
    author = {Mezhov-Deglin, L. P. and Iznankin, A. Yu. and Mineev, V. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {32},
    issue = {3},
    pages = {217},
    year = {1980},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21672.shtml},
}