@misc{MZ_1924__19_167767,
     title = {Knopp, {K.,} {Zur} {Theorie} der {C-} und {H-Summierbarkeit}},
     journal = {Mathematische Zeitschrift},
     pages = {97--113},
     publisher = {mathdoc},
     volume = {19},
     year = {1924},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/MZ_1924__19_167767/}
}