@article{1102969436,
author = {Reid, William T.},
title = {A disconjugacy criterion for higher order linear vector differential equations.},
journal = {Pacific J. Math.},
volume = {39},
number = {3},
year = {1971},
pages = { 795-806},
language = {en},
url = {http://dml.mathdoc.fr/item/1102969436}
}
Reid, William T. A disconjugacy criterion for higher order linear vector differential equations.. Pacific J. Math., Tome 39 (1971) no. 3, pp. 795-806. http://gdmltest.u-ga.fr/item/1102969436/