@article{JRAM_1970__243_151030,
     author = {Hans-Heinrich L\"uck},
     title = {Projektive {Hjelmslevr\"aume.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {121--158},
     publisher = {mathdoc},
     volume = {243},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1970__243_151030/}
}