@article{1195517002,
author = {Yoshizawa, Mitsuo},
title = {Block intersection numbers of block designs},
journal = {Proc. Japan Acad. Ser. A Math. Sci.},
volume = {56},
number = {2},
year = {1980},
pages = { 75-76},
language = {en},
url = {http://dml.mathdoc.fr/item/1195517002}
}
Yoshizawa, Mitsuo. Block intersection numbers of block designs. Proc. Japan Acad. Ser. A Math. Sci., Tome 56 (1980) no. 2, pp. 75-76. http://gdmltest.u-ga.fr/item/1195517002/