The porous medium equation as a finite-speed approximation to a Hamilton-Jacobi equation
Annales de l'I.H.P. Analyse non linéaire, Tome 4 (1987) no. 3, pp. 203-230. 
@article{AIHPC_1987__4_3_203_0,
     author = {Aronson, D. G. and Vazquez, J. L.},
     title = {The porous medium equation as a finite-speed approximation to a {Hamilton-Jacobi} equation},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {203--230},
     publisher = {Gauthier-Villars},
     volume = {4},
     number = {3},
     year = {1987},
     mrnumber = {898047},
     zbl = {0635.35047},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPC_1987__4_3_203_0/}
}
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Aronson, D. G.; Vazquez, J. L. The porous medium equation as a finite-speed approximation to a Hamilton-Jacobi equation. Annales de l'I.H.P. Analyse non linéaire, Tome 4 (1987) no. 3, pp. 203-230. http://archive.numdam.org/item/AIHPC_1987__4_3_203_0/

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