@article{03708917,
title = {Existence theorem for the difference equation },
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {3},
year = {1980},
pages = {69-77},
doi = {10.1155/S0161171280000051},
zbl = {0453.39001},
language = {en},
url = {http://dml.mathdoc.fr/item/03708917}
}
Weil, F. Existence theorem for the difference equation . International Journal of Mathematics and Mathematical Sciences, Tome 3 (1980) pp. 69-77. doi : 10.1155/S0161171280000051. http://gdmltest.u-ga.fr/item/03708917/