@article{IM_1973__20_142215,
     author = {Maurizio Cornalba},
     title = {Two {Theorems} on {Modifications} of {Analytic} {Spaces.}},
     journal = {Inventiones mathematicae},
     pages = {227--248},
     publisher = {mathdoc},
     volume = {20},
     year = {1973},
     zbl = {0264.32006},
     url = {http://geodesic.mathdoc.fr/item/IM_1973__20_142215/}
}