@article{1103044616,
author = {Whyburn, William M.},
title = {A nonlinear boundary value problem for second order differential systems.},
journal = {Pacific J. Math.},
volume = {5},
number = {4},
year = {1955},
pages = { 147-160},
language = {en},
url = {http://dml.mathdoc.fr/item/1103044616}
}
Whyburn, William M. A nonlinear boundary value problem for second order differential systems.. Pacific J. Math., Tome 5 (1955) no. 4, pp. 147-160. http://gdmltest.u-ga.fr/item/1103044616/