@misc{10_4153_CJM_1969_008_5,
     title = {Hjelmslev {Planes} {Derived} from {Modular} {Lattices}},
     journal = {Canadian journal of mathematics},
     pages = {76--83},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-008-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-008-5/}
}