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@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/} }
R. A. Prokhorova. Certain properties of the smaller exponent when there are Perron perturbations. Differencialʹnye uravneniâ, Tome 11 (1975) no. 6, pp. 997-1004. http://geodesic.mathdoc.fr/item/DE_1975_11_6_a4/