@article{JEMS_2016_18_12_a7,
     author = {Juha Kinnunen and Peter Lindqvist and Teemu Lukkari},
     title = {Perron's method for the porous medium equation},
     journal = {Journal of the European Mathematical Society},
     pages = {2953--2969},
     publisher = {mathdoc},
     volume = {18},
     number = {12},
     year = {2016},
     doi = {10.4171/jems/658},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/658/}
}