@article{1103038626, author = {Brauer, Fred}, title = {Spectral theory for linear systems of differential equations.}, journal = {Pacific J. Math.}, volume = {10}, number = {4}, year = {1960}, pages = { 17-34}, language = {en}, url = {http://dml.mathdoc.fr/item/1103038626} }
Brauer, Fred. Spectral theory for linear systems of differential equations.. Pacific J. Math., Tome 10 (1960) no. 4, pp. 17-34. http://gdmltest.u-ga.fr/item/1103038626/