@article{10_4153_CJM_1970_057_2,
     author = {Hestenes, Marshall D.},
     title = {Singer {Groups}},
     journal = {Canadian journal of mathematics},
     pages = {492--513},
     year = {1970},
     volume = {22},
     number = {3},
     doi = {10.4153/CJM-1970-057-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-057-2/}
}