@article{AFM_2002_27_1_a2,
     author = {P. Ebenfelt and D. Khavinson and H.S. Shapiro},
     title = {A free boundary problem related to single-layer potentials},
     journal = {Annales Fennici Mathematici},
     pages = {21--46},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2002_27_1_a2/}
}