@article{1250129948,
author = {Kelley, Walter G.},
title = {A geometric method of studying two point boundary value problems for second order systems},
journal = {Rocky Mountain J. Math.},
volume = {7},
number = {4},
year = {1977},
pages = { 251-264},
language = {en},
url = {http://dml.mathdoc.fr/item/1250129948}
}
Kelley, Walter G. A geometric method of studying two point boundary value problems for second order systems. Rocky Mountain J. Math., Tome 7 (1977) no. 4, pp. 251-264. http://gdmltest.u-ga.fr/item/1250129948/