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@article{PIM_1979_N_S_26_40_a5, author = {Richard Bieberich}, title = {Bounded {Functions} {With} {No} {Spectral} {Gaps}}, journal = {Publications de l'Institut Math\'ematique}, pages = {35 }, publisher = {mathdoc}, volume = {_N_S_26}, number = {40}, year = {1979}, url = {http://geodesic.mathdoc.fr/item/PIM_1979_N_S_26_40_a5/} }
Richard Bieberich. Bounded Functions With No Spectral Gaps. Publications de l'Institut Mathématique, _N_S_26 (1979) no. 40, p. 35 . http://geodesic.mathdoc.fr/item/PIM_1979_N_S_26_40_a5/