@article{DE_1965_1_3_a2,
     author = {N. P. Erugin},
     title = {The analytic structure and fundamental properties of solutions of equations with algebroidal right-hand sides in case of focus and generalizations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {303--312},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1965_1_3_a2/}
}