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@article{MZ_1990__205_3_174199, author = {Matti Vuorinen}, title = {Quadruples and spatial quasiconformal mappings.}, journal = {Mathematische Zeitschrift}, pages = {617--628}, publisher = {mathdoc}, volume = {205}, number = {3}, year = {1990}, zbl = {0692.30018}, url = {http://geodesic.mathdoc.fr/item/MZ_1990__205_3_174199/} }
Matti Vuorinen. Quadruples and spatial quasiconformal mappings.. Mathematische Zeitschrift, Tome 205 (1990) no. 3, pp. 617-628. http://geodesic.mathdoc.fr/item/MZ_1990__205_3_174199/