@article{1102706440, author = {Bruen, A. A. and Rothschild, B. L.}, title = {Lower bounds on blocking sets.}, journal = {Pacific J. Math.}, volume = {120}, number = {2}, year = {1985}, pages = { 303-311}, language = {en}, url = {http://dml.mathdoc.fr/item/1102706440} }
Bruen, A. A.; Rothschild, B. L. Lower bounds on blocking sets.. Pacific J. Math., Tome 120 (1985) no. 2, pp. 303-311. http://gdmltest.u-ga.fr/item/1102706440/