@article{MZ_1932__34_168310,
     author = {J., Ridder},
     title = {\"Uber den {Perronschen} {Integralbegriff} und seine {Beziehung} zu den {R-,} {L-} und {D-Integralen}},
     journal = {Mathematische Zeitschrift},
     pages = {234--269},
     publisher = {mathdoc},
     volume = {34},
     year = {1932},
     zbl = {57.0296.03},
     url = {http://geodesic.mathdoc.fr/item/MZ_1932__34_168310/}
}