@article{DA_2001_8_4_a2,
     author = {O. V. Borodin and A. N. Glebov},
     title = {On the partition of a~planar graph of girth~5 into an empty and an acyclic subgraph},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {34--53},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2001_8_4_a2/}
}