@article{01054257,
title = {Noninclusion theorems for summability matrices.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {20},
year = {1997},
pages = {511-516},
doi = {10.1155/S0161171297000690},
zbl = {0886.40005},
language = {en},
url = {http://dml.mathdoc.fr/item/01054257}
}
Fridy, J.A. Noninclusion theorems for summability matrices.. International Journal of Mathematics and Mathematical Sciences, Tome 20 (1997) pp. 511-516. doi : 10.1155/S0161171297000690. http://gdmltest.u-ga.fr/item/01054257/