@article{GDZPPN002401509, title = {Strong N\"orlund Summability.}, journal = {Mathematische Zeitschrift}, volume = {105}, year = {1968}, pages = {94-111}, zbl = {0157.38001}, url = {http://dml.mathdoc.fr/item/GDZPPN002401509} }
Borwein, D.; Cass, F.P. Strong Nörlund Summability.. Mathematische Zeitschrift, Tome 105 (1968) pp. 94-111. http://gdmltest.u-ga.fr/item/GDZPPN002401509/