@article{1103051774,
author = {Burton, Leonard P.},
title = {Oscillation theorems for the solutions of linear, nonhomogeneous, second-order differential systems.},
journal = {Pacific J. Math.},
volume = {2},
number = {4},
year = {1952},
pages = { 281-289},
language = {en},
url = {http://dml.mathdoc.fr/item/1103051774}
}
Burton, Leonard P. Oscillation theorems for the solutions of linear, nonhomogeneous, second-order differential systems.. Pacific J. Math., Tome 2 (1952) no. 4, pp. 281-289. http://gdmltest.u-ga.fr/item/1103051774/