@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/}
}