@article{AA_1990_2_4_a7,
     author = {V. A. Solonnikov and E. V. Frolova},
     title = {A~problem with the third boundary condition for the {Laplace} equation in a~plane angle and its applications to parabolic problems},
     journal = {Algebra i analiz},
     pages = {213--241},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1990_2_4_a7/}
}