@article{DAN_1979_247_6_a14,
     author = {P. N. Vabishchevich and L. M. Degtyarev},
     title = {A method of solution of the free-boundary problem for elliptic equations and systems},
     journal = {Doklady Akademii Nauk},
     pages = {1342--1346},
     publisher = {mathdoc},
     volume = {247},
     number = {6},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_247_6_a14/}
}