%0 Journal Article %A Lüneburg, Heinz %T Characterizations of the Generalized Hughes Planes %J Canadian journal of mathematics %D 1976 %P 376-402 %V 28 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-039-7/ %R 10.4153/CJM-1976-039-7 %F 10_4153_CJM_1976_039_7