@article{CM_1936__3__380_0,
     author = {Schwerdtfeger, Hans},
     title = {\"Uber mehrdeutige {Matrixfunktionen}},
     journal = {Compositio Mathematica},
     pages = {380--390},
     publisher = {Johnson Reprint Corporation},
     volume = {3},
     year = {1936},
     zbl = {0015.09803},
     language = {de},
     url = {http://www.numdam.org/item/CM_1936__3__380_0/}
}