@article{ELMA_1979__34_141227,
     author = {A. Mrose},
     title = {Die {Intervalleigenschaft} der {Ober-} und {Untersummenmengen} einer beschr\"ankten {Funktion.}},
     journal = {Elemente der Mathematik},
     pages = {34--37},
     publisher = {mathdoc},
     volume = {34},
     year = {1979},
     zbl = {0406.26007},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1979__34_141227/}
}