@article{1183502564, author = {Hill, J. D.}, title = {On perfect summability of double sequences}, journal = {Bull. Amer. Math. Soc.}, volume = {46}, number = {11}, year = {1940}, pages = { 327-331}, language = {en}, url = {http://dml.mathdoc.fr/item/1183502564} }
Hill, J. D. On perfect summability of double sequences. Bull. Amer. Math. Soc., Tome 46 (1940) no. 11, pp. 327-331. http://gdmltest.u-ga.fr/item/1183502564/