@article{PismaZhETF.92.95,
    title = {Weak solution for the Hele-Shaw problem: viscous  shocks and singularities},
    author = {Lee S-Y.,  and Teodorescu, R. and Wiegmann, P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {92},
    issue = {2},
    pages = {95},
    year = {2010},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_28904.shtml},
}