@article{JRAM_1971__248_151115,
     author = {F.W. Sch\"afke},
     title = {Integrationstheorie. {II.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {147--171},
     year = {1971},
     volume = {248},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1971__248_151115/}
}