@article{SM_2008_199_2_a6,
     author = {I. A. Cheltsov},
     title = {Double spaces with isolated singularities},
     journal = {Sbornik. Mathematics},
     pages = {291--306},
     publisher = {mathdoc},
     volume = {199},
     number = {2},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2008_199_2_a6/}
}