@article{DE_1977_13_6_a20,
     author = {P. Lazov and D. Dimitrovski},
     title = {Conditions for the existence of the maximal number of polynomial solutions of algebraic differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1131--1134},
     publisher = {mathdoc},
     volume = {13},
     number = {6},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_6_a20/}
}