@article{DA_2000_7_4_a2,
     author = {V. E. Alekseev and S. V. Sorochan},
     title = {On the entropy of hereditary classes of oriented graphs},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {20--28},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2000_7_4_a2/}
}