@article{DE_1975_11_6_a4,
     author = {R. A. Prokhorova},
     title = {Certain properties of the smaller exponent when there are {Perron} perturbations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {997--1004},
     publisher = {mathdoc},
     volume = {11},
     number = {6},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_6_a4/}
}