@article{MV_1979_31_1_a9,
     author = {O. Konstantin},
     title = {Application of the approximate analytic prolongment to the boundary problems of the partial differential equations},
     journal = {Matemati\v{c}ki vesnik},
     pages = {61 },
     year = {1979},
     volume = {31},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1979_31_1_a9/}
}