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@article{JRAM_1982__330_152403, author = {Robert O. Shelton and Raj P. Soni}, title = {Aperiodic words on three symbols. {III.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {44--52}, publisher = {mathdoc}, volume = {330}, year = {1982}, zbl = {0467.05010}, url = {http://geodesic.mathdoc.fr/item/JRAM_1982__330_152403/} }
Robert O. Shelton; Raj P. Soni. Aperiodic words on three symbols. III.. Journal für die reine und angewandte Mathematik, Tome 330 (1982), pp. 44-52. http://geodesic.mathdoc.fr/item/JRAM_1982__330_152403/