@article{DE_1990_26_9_a12,
     author = {Ya. S. Kushitsky},
     title = {The {Tikhonov} problem for second-order linear parabolic equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1576--1585},
     publisher = {mathdoc},
     volume = {26},
     number = {9},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_9_a12/}
}