@article{AIHPC_2003__20_1_13_0,
     author = {Gil, O. and Quir\'os, F.},
     title = {Boundary layer formation in the transition from the porous media equation to a {Hele-Shaw} flow},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {13--36},
     publisher = {Elsevier},
     volume = {20},
     number = {1},
     year = {2003},
     zbl = {1030.35107},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_2003__20_1_13_0/}
}