@article{DE_1991_27_7_a18,
     author = {M. M. Khapaev (Jr.)},
     title = {The boundary element method for problems with corner points and mixed boundary conditions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1263--1267},
     publisher = {mathdoc},
     volume = {27},
     number = {7},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_7_a18/}
}