@article{03719537,
title = {Sturmian theorems for systems of differential equations.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {3},
year = {1980},
pages = {177-184},
doi = {10.1155/S0161171280000117},
zbl = {0459.34016},
language = {en},
url = {http://dml.mathdoc.fr/item/03719537}
}
Chan, C.Y. Sturmian theorems for systems of differential equations.. International Journal of Mathematics and Mathematical Sciences, Tome 3 (1980) pp. 177-184. doi : 10.1155/S0161171280000117. http://gdmltest.u-ga.fr/item/03719537/