@article{01907234, title = {The oscillation of linear first order differential systems.}, journal = {APPS. Applied Sciences}, volume = {5}, year = {2003}, pages = {33-39}, zbl = {1047.34028}, language = {en}, url = {http://dml.mathdoc.fr/item/01907234} }
Hishyar, Abdullah Kh.; Al Dosary, K.T. The oscillation of linear first order differential systems.. APPS. Applied Sciences, Tome 5 (2003) pp. 33-39. http://gdmltest.u-ga.fr/item/01907234/