@article{00645174, title = {On some two-point boundary value problems for two-dimensional systems of ordinary differential equations.}, journal = {Georgian Mathematical Journal}, volume = {1}, year = {1994}, pages = {303-314}, doi = {10.1007/BF02254678}, zbl = {0804.34024}, language = {en}, url = {http://dml.mathdoc.fr/item/00645174} }
Lomtatidze, A. On some two-point boundary value problems for two-dimensional systems of ordinary differential equations.. Georgian Mathematical Journal, Tome 1 (1994) pp. 303-314. doi : 10.1007/BF02254678. http://gdmltest.u-ga.fr/item/00645174/