@article{SM_1975_25_2_a2,
     author = {F. L. Zak},
     title = {Deformations of modifications of algebraic spaces},
     journal = {Sbornik. Mathematics},
     pages = {199--223},
     year = {1975},
     volume = {25},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_25_2_a2/}
}