@article{1077466537,
author = {Bellman, Richard},
title = {Boundedness of the solutions of second order linear
differential equations},
journal = {Duke Math. J.},
volume = {22},
number = {1},
year = {1955},
pages = { 511-513},
language = {en},
url = {http://dml.mathdoc.fr/item/1077466537}
}
Bellman, Richard. Boundedness of the solutions of second order linear
differential equations. Duke Math. J., Tome 22 (1955) no. 1, pp. 511-513. http://gdmltest.u-ga.fr/item/1077466537/