@article{MZM_1997_62_3_a13,
     author = {I. A. Cheltsov},
     title = {Del {Pezzo} surfaces with nonrational singularities},
     journal = {Matemati\v{c}eskie zametki},
     pages = {451--467},
     publisher = {mathdoc},
     volume = {62},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1997_62_3_a13/}
}