@article{PORMA_1991__48_4_115769,
     author = {Santos, Lisa},
     title = {A diffusion problem with gradient constraint and evolutive {Dirichlet} condition},
     journal = {Portugaliae mathematica},
     pages = {441--468},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {1991},
     mrnumber = {1147610},
     zbl = {0773.49006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1991__48_4_115769/}
}