@article{AA_2015_27_3_a9,
     author = {J. F. Rodrigues},
     title = {On the free boundary in heterogeneous obstacle-type problems with two phases},
     journal = {Algebra i analiz},
     pages = {202--219},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AA_2015_27_3_a9/}
}