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@article{MZ_1972__129_171817, author = {Nirmala B. Limaye}, title = {Cross-Ratios and {Projectivities} of a {Line.}}, journal = {Mathematische Zeitschrift}, pages = {49--54}, publisher = {mathdoc}, volume = {129}, year = {1972}, zbl = {0232.13008}, url = {http://geodesic.mathdoc.fr/item/MZ_1972__129_171817/} }
Nirmala B. Limaye. Cross-Ratios and Projectivities of a Line.. Mathematische Zeitschrift, Tome 129 (1972), pp. 49-54. http://geodesic.mathdoc.fr/item/MZ_1972__129_171817/