@article{10_4153_CJM_1972_011_4,
     author = {Cofman, Judita},
     title = {Baer {Subplanes} in {Finite} {Projective} and {Affine} {Planes}},
     journal = {Canadian journal of mathematics},
     pages = {90--97},
     year = {1972},
     volume = {24},
     number = {1},
     doi = {10.4153/CJM-1972-011-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-011-4/}
}