@article{DE_1996_32_1_a8,
     author = {L. V. Kritskov},
     title = {Distribution of eigenvalues for uniformly minimal systems of root functions of ordinary differential operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {62--70},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_1_a8/}
}