@article{JRAM_1933__169_149857,
     author = {J.R. Wilton},
     title = {An approximate functional equation with applications to a problem of {Diophantine} approximation.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {219--237},
     publisher = {mathdoc},
     volume = {169},
     year = {1933},
     zbl = {0007.05604},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1933__169_149857/}
}