@article{00130451, title = {A focal boundary value problem for difference equations.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {16}, year = {1993}, pages = {169-176}, doi = {10.1155/S0161171293000201}, zbl = {0766.39001}, language = {en}, url = {http://dml.mathdoc.fr/item/00130451} }
Denny, Cathryn; Hankerson, Darrel. A focal boundary value problem for difference equations.. International Journal of Mathematics and Mathematical Sciences, Tome 16 (1993) pp. 169-176. doi : 10.1155/S0161171293000201. http://gdmltest.u-ga.fr/item/00130451/