@article{PMF_1911_22_1_a8,
     author = {Toeplitz, Otto},
     title = {\"Uber allgemeine lineare {Mittelbildungen.}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {113--119},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1911},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/PMF_1911_22_1_a8/}
}