@article{01049440, title = {Ste\v ckin inequalities for summability methods.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {20}, year = {1997}, pages = {93-100}, doi = {10.1155/S0161171297000136}, zbl = {0878.41011}, language = {en}, url = {http://dml.mathdoc.fr/item/01049440} }
Cao, Jiading. Stečkin inequalities for summability methods.. International Journal of Mathematics and Mathematical Sciences, Tome 20 (1997) pp. 93-100. doi : 10.1155/S0161171297000136. http://gdmltest.u-ga.fr/item/01049440/