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@article{MAN_1972__196_162261, author = {Helmut Salzmann}, title = {Homogene 4-dimensionale affine {Ebenen.}}, journal = {Mathematische Annalen}, pages = {320--322}, publisher = {mathdoc}, volume = {196}, year = {1972}, zbl = {0221.50008}, url = {http://geodesic.mathdoc.fr/item/MAN_1972__196_162261/} }
Helmut Salzmann. Homogene 4-dimensionale affine Ebenen.. Mathematische Annalen, Tome 196 (1972), pp. 320-322. http://geodesic.mathdoc.fr/item/MAN_1972__196_162261/