@article{JAC_1997__6_2_a3,
     author = {Ebert, G.L.},
     title = {Buekenhout-Tits unitals},
     journal = {Journal of Algebraic Combinatorics},
     pages = {133--140},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_1997__6_2_a3/}
}