@article{SM_1991_69_1_a2,
     author = {S. I. Trifonov},
     title = {Divergence of {Dulac's} rows},
     journal = {Sbornik. Mathematics},
     pages = {37--56},
     publisher = {mathdoc},
     volume = {69},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1991_69_1_a2/}
}