@article{DE_1995_31_10_a7,
     author = {Kh. K. Ishkin},
     title = {Asymptotics of the spectrum and the regularized trace of higher-order singular differential operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1658--1668},
     publisher = {mathdoc},
     volume = {31},
     number = {10},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_10_a7/}
}