@article{05823124,
title = {Positive solutions of a singular positone and semipositone boundary value problems for fourth-order difference equations.},
journal = {Discrete Dynamics in Nature and Society},
volume = {2010},
year = {2010},
doi = {10.1155/2010/312864},
zbl = {1204.39012},
language = {en},
url = {http://dml.mathdoc.fr/item/05823124}
}
Yuan, Chengjun. Positive solutions of a singular positone and semipositone boundary value problems for fourth-order difference equations.. Discrete Dynamics in Nature and Society, Tome 2010 (2010) . doi : 10.1155/2010/312864. http://gdmltest.u-ga.fr/item/05823124/