@article{JRAM_1973__258_151281,
     author = {R. Park and E. Grassmann},
     title = {A characterization of collineations by order geometry.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {79--86},
     publisher = {mathdoc},
     volume = {258},
     year = {1973},
     zbl = {0248.53054},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__258_151281/}
}