@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/