@article{DE_1985_21_2_a18,
     author = {P. B. Golokvoschyus},
     title = {Asymptotic estimates of the norm of an integral matrix of a two-dimensional system of differential equations in the neighborhood of a singular point of the system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {325--328},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_2_a18/}
}