@article{MAN_1890__35_157473,
     author = {Wiltheiss},
     title = {Eine besondere {Art} von {Covarianten} bildender {Operation.}},
     journal = {Mathematische Annalen},
     pages = {433--450},
     publisher = {mathdoc},
     volume = {35},
     year = {1890},
     zbl = {21.0109.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1890__35_157473/}
}