@article{RLIN_2004_9_15_3-4_a0,
     author = {Friedman, Avner},
     title = {Free boundary problems arising in tumor models},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {161--168},
     publisher = {mathdoc},
     volume = {Ser. 9, 15},
     number = {3-4},
     year = {2004},
     zbl = {1162.35460},
     mrnumber = {1976462},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_2004_9_15_3-4_a0/}
}