@article{1181073056,
author = {Hankerson, Darrel},
title = {Right and left disconjugacy in difference equations},
journal = {Rocky Mountain J. Math.},
volume = {20},
number = {4},
year = {1990},
pages = { 987-995},
language = {en},
url = {http://dml.mathdoc.fr/item/1181073056}
}
Hankerson, Darrel. Right and left disconjugacy in difference equations. Rocky Mountain J. Math., Tome 20 (1990) no. 4, pp. 987-995. http://gdmltest.u-ga.fr/item/1181073056/