@article{GDZPPN002387069, title = {On a theorem of Frobenius and Knopp for Abel summability.}, journal = {Mathematische Zeitschrift}, volume = {67}, year = {1957}, pages = {310-319}, zbl = {0077.27703}, url = {http://dml.mathdoc.fr/item/GDZPPN002387069} }
Rajagopal, C.T. On a theorem of Frobenius and Knopp for Abel summability.. Mathematische Zeitschrift, Tome 67 (1957) pp. 310-319. http://gdmltest.u-ga.fr/item/GDZPPN002387069/