@article{10_4171_ifb_255,
     author = {Daniela De Silva},
     title = {Free boundary regularity for a problem with right hand side},
     journal = {Interfaces and free boundaries},
     pages = {223--238},
     year = {2011},
     volume = {13},
     number = {2},
     doi = {10.4171/ifb/255},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/255/}
}