@article{bwmeta1.element.bwnjournal-article-pmfv44i1p19bwm, author = {Edmund Landau}, title = {\"Uber mehrfach monotone Folgen}, journal = {Prace Matematyczno-Fizyczne}, volume = {45}, year = {1937}, pages = {337-351}, zbl = {0016.01603}, language = {deu}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-pmfv44i1p19bwm} }
Landau, Edmund. Über mehrfach monotone Folgen. Prace Matematyczno-Fizyczne, Tome 45 (1937) pp. 337-351. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-pmfv44i1p19bwm/