@article{10_4153_CMB_1969_103_7,
     author = {Bruen, A. and Fisher, J. C.},
     title = {Spreads which are {Not} {Dual} {Spreads}},
     journal = {Canadian mathematical bulletin},
     pages = {801--803},
     year = {1969},
     volume = {12},
     number = {6},
     doi = {10.4153/CMB-1969-103-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-103-7/}
}