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@article{SF_1975__10_134123, author = {J. van Leeuwen}, title = {On the fixpoints of monogenic functions in free monoids.}, journal = {Semigroup forum}, pages = {315--328}, publisher = {mathdoc}, volume = {10}, year = {1975}, zbl = {0299.20044}, url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134123/} }
J. van Leeuwen. On the fixpoints of monogenic functions in free monoids.. Semigroup forum, Tome 10 (1975), pp. 315-328. http://geodesic.mathdoc.fr/item/SF_1975__10_134123/