@article{JRAM_1950__188_150181,
     author = {Hermann Wendelin},
     title = {Untersuchungen zur {Mengenalgebra.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {78--99},
     publisher = {mathdoc},
     volume = {188},
     year = {1950},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1950__188_150181/}
}