@article{JRAM_1887__101_148692,
     author = {A. Cayley},
     title = {Note on the {Theory} of {Linear} {Differential} {Equations.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {209--213},
     publisher = {mathdoc},
     volume = {101},
     year = {1887},
     zbl = {19.0307.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1887__101_148692/}
}