@article{GDZPPN001250744, title = {On the fixpoints of monogenic functions in free monoids.}, journal = {Semigroup forum}, volume = {11}, year = {1975}, pages = {315-328}, zbl = {0299.20044}, url = {http://dml.mathdoc.fr/item/GDZPPN001250744} }
Leeuwen, J. van. On the fixpoints of monogenic functions in free monoids.. Semigroup forum, Tome 11 (1975) pp. 315-328. http://gdmltest.u-ga.fr/item/GDZPPN001250744/