@article{MZ_1923__18_167751,
     author = {K. Knopp},
     title = {\"Uber das {Eulersche} {Summierungsverfahren.} (11. {Mitteilung)}},
     journal = {Mathematische Zeitschrift},
     pages = {125--156},
     publisher = {mathdoc},
     volume = {18},
     year = {1923},
     zbl = {49.0234.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1923__18_167751/}
}