@article{1103043799,
author = {Reid, William T.},
title = {Oscillation criteria for linear differential systems with complex coefficients.},
journal = {Pacific J. Math.},
volume = {6},
number = {4},
year = {1956},
pages = { 733-751},
language = {en},
url = {http://dml.mathdoc.fr/item/1103043799}
}
Reid, William T. Oscillation criteria for linear differential systems with complex coefficients.. Pacific J. Math., Tome 6 (1956) no. 4, pp. 733-751. http://gdmltest.u-ga.fr/item/1103043799/