Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts
@article{MV_1971_23_1_a12, author = {S. N. Lal}, title = {On the absolute summability factors of infinite series}, journal = {Matemati\v{c}ki vesnik}, pages = {109 }, publisher = {mathdoc}, volume = {23}, number = {1}, year = {1971}, url = {http://geodesic.mathdoc.fr/item/MV_1971_23_1_a12/} }
S. N. Lal. On the absolute summability factors of infinite series. Matematički vesnik, Tome 23 (1971) no. 1, p. 109 . http://geodesic.mathdoc.fr/item/MV_1971_23_1_a12/