@article{SM_2004_195_6_a4,
     author = {S. A. Kudryavtsev},
     title = {Complements on~log surfaces},
     journal = {Sbornik. Mathematics},
     pages = {859--878},
     publisher = {mathdoc},
     volume = {195},
     number = {6},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_6_a4/}
}