@article{JRAM_1971__247_151101,
     author = {D. Borwein and J.H. Rizvi},
     title = {On {Abel-type} methods of summability.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {139--145},
     publisher = {mathdoc},
     volume = {247},
     year = {1971},
     zbl = {0211.09101},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1971__247_151101/}
}