@article{DAN_1989_309_2_a0,
     author = {V. A. Galaktionov},
     title = {A sharp estimate for the support of the unbounded solution of a},
     journal = {Doklady Akademii Nauk},
     pages = {265--268},
     publisher = {mathdoc},
     volume = {309},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_2_a0/}
}