@article{DE_1987_23_10_a18,
     author = {V. P. Igumnov},
     title = {Calculation of the coefficients of {Lie} series for solving ordinary differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1802--1804},
     publisher = {mathdoc},
     volume = {23},
     number = {10},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_10_a18/}
}