@article{03638647, title = {The four known biplanes with k=11.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2}, year = {1979}, pages = {251-260}, doi = {10.1155/S0161171279000235}, zbl = {0411.51006}, language = {en}, url = {http://dml.mathdoc.fr/item/03638647} }
Salwach, Chester J.; Mezzaroba, Joseph A. The four known biplanes with k=11.. International Journal of Mathematics and Mathematical Sciences, Tome 2 (1979) pp. 251-260. doi : 10.1155/S0161171279000235. http://gdmltest.u-ga.fr/item/03638647/