@article{DE_1973_9_5_a9,
     author = {L. F. Rakhmatullina and A. G. Terent'ev},
     title = {On the question of the regularization of linear boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {868--873},
     publisher = {mathdoc},
     volume = {9},
     number = {5},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_5_a9/}
}