@article{DE_1981_17_10_a12,
     author = {A. A. Dezin},
     title = {On weak and strong irregularity},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1851--1858},
     publisher = {mathdoc},
     volume = {17},
     number = {10},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_10_a12/}
}