%0 Journal Article %A Ostrom, T. G. %A Sherk, F. A. %T Finite Projective Planes with Affine Subplanes %J Canadian mathematical bulletin %D 1964 %P 549-559 %V 7 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1964-051-8/ %R 10.4153/CMB-1964-051-8 %F 10_4153_CMB_1964_051_8