@article{DE_1998_34_9_a18,
     author = {O. M. Penkin and E. M. Bogatov and Yu. M. Kashkarov},
     title = {On the solvability of elliptic boundary value problems on stratified sets},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1289--1290},
     publisher = {mathdoc},
     volume = {34},
     number = {9},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_9_a18/}
}