@article{PismaZhETF.78.108,
    title = {Mach cones and magnetic forces in Saturn's rings},
    author = {Hartquist, T. W. and Havnes, O.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {78},
    issue = {2},
    pages = {108},
    year = {2003},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_518.shtml},
}