@article{JRAM_1929__161_149705,
     author = {Ludwig Schlesinger},
     title = {\"Uber den {Logarithmus} einer {Matrix.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {199--200},
     publisher = {mathdoc},
     volume = {161},
     year = {1929},
     zbl = {55.0067.04},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1929__161_149705/}
}