@article{JOLT_2010_20_2_a0,
     author = {Wolfgang Bertram and Michael Kinyon},
     title = {Associative {Geometries.} {I:} {Torsors,} {Linear} {Relations} and {Grassmannians}},
     journal = {Journal of Lie Theory},
     pages = {215--252},
     year = {2010},
     volume = {20},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2010_20_2_a0/}
}