@article{SM_1997_188_11_a3,
     author = {Yu. G. Prokhorov},
     title = {On the existence of complements of the~canonical divisor for  {Mori} conic bundles},
     journal = {Sbornik. Mathematics},
     pages = {1665--1685},
     publisher = {mathdoc},
     volume = {188},
     number = {11},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1997_188_11_a3/}
}