@article{01780409,
title = {Optimal bound for the number of },
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {30},
year = {2002},
pages = {123-126},
doi = {10.1155/S0161171202013194},
zbl = {1043.14009},
language = {en},
url = {http://dml.mathdoc.fr/item/01780409}
}
Lahyane, Mustapha. Optimal bound for the number of . International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 123-126. doi : 10.1155/S0161171202013194. http://gdmltest.u-ga.fr/item/01780409/