@article{DE_1992_28_10_a4,
     author = {D. L. Kudryavtsev},
     title = {Monodromy group of a second-order linear differential equation with regular singular points},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1698--1708},
     publisher = {mathdoc},
     volume = {28},
     number = {10},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_10_a4/}
}