@article{1077378629, author = {Winter, M.}, title = {Harmonic difference equations}, journal = {Duke Math. J.}, volume = {36}, number = {1}, year = {1969}, pages = { 677-681}, language = {en}, url = {http://dml.mathdoc.fr/item/1077378629} }
Winter, M. Harmonic difference equations. Duke Math. J., Tome 36 (1969) no. 1, pp. 677-681. http://gdmltest.u-ga.fr/item/1077378629/