@article{IM2_1967_1_3_a4,
     author = {Yu. P. Krasovskii},
     title = {Investigation of potentials associated with boundary problems for elliptic equations},
     journal = {Izvestiya. Mathematics},
     pages = {569--622},
     year = {1967},
     volume = {1},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1967_1_3_a4/}
}