@article{FPM_2008_14_4_a1,
     author = {S. A. Abramov and A. A. Ryabenko},
     title = {Indicial rational functions of linear ordinary differential equations with polynomial coefficients},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {15--34},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2008_14_4_a1/}
}