@article{IM_1971__14_142103,
     author = {Michael Schlessinger},
     title = {Rigidity of {Quotient} {Singularities.}},
     journal = {Inventiones mathematicae},
     pages = {17--26},
     publisher = {mathdoc},
     volume = {14},
     year = {1971},
     zbl = {0232.14005},
     url = {http://geodesic.mathdoc.fr/item/IM_1971__14_142103/}
}