@article{2865,
author = {Szmanda, B.},
title = {Oscillation of solutions of second order difference equations},
journal = {Portugaliae mathematica},
volume = {37},
year = {1978},
pages = {251-254},
zbl = {0456.39003},
mrnumber = {0633031},
language = {en},
url = {http://dml.mathdoc.fr/item/2865}
}
Szmanda, B. Oscillation of solutions of second order difference equations. Portugaliae mathematica, Tome 37 (1978) pp. 251-254. http://gdmltest.u-ga.fr/item/2865/