@article{DE_1999_35_10_a16,
     author = {E. A. Ermolaev},
     title = {Extension of classes of exactly solvable degenerate systems of {Fedorov} equations by means of dual $n$-numbers},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1426--1428},
     publisher = {mathdoc},
     volume = {35},
     number = {10},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_10_a16/}
}