@article{DE_1987_23_5_a0,
     author = {A. V. Bitsadze and A. A. Dorodnitsyn and V. A. Il'in and A. A. Samarskii and A. N. Tikhonov},
     title = {Nikola{\v\i} {Pavlovich} {Erugin} (on the occasion of his eightieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {739--744},
     publisher = {mathdoc},
     volume = {23},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_5_a0/}
}