@article{GDZPPN002219301, title = {On Three Problems For Sequences.}, journal = {Manuscripta mathematica}, volume = {17}, year = {1975}, pages = {221-226}, zbl = {0314.40001}, url = {http://dml.mathdoc.fr/item/GDZPPN002219301} }
Landers, D.; Rogge, L. On Three Problems For Sequences.. Manuscripta mathematica, Tome 17 (1975) pp. 221-226. http://gdmltest.u-ga.fr/item/GDZPPN002219301/