@article{VMUMM_1990_5_a17,
     author = {A. V. Astrelin},
     title = {An estimate for the degree of irreducible eigenpolynomials of a differential operator of a certain type},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {75--77},
     publisher = {mathdoc},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1990_5_a17/}
}