@article{GDZPPN002177617,
title = {The solution of linear differential systems by quadratures.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {197},
year = {1957},
pages = {104-111},
zbl = {0077.08502},
url = {http://dml.mathdoc.fr/item/GDZPPN002177617}
}
Truesdell, C.; Bernstein, B. The solution of linear differential systems by quadratures.. Journal für die reine und angewandte Mathematik, Tome 197 (1957) pp. 104-111. http://gdmltest.u-ga.fr/item/GDZPPN002177617/