@article{10_1017_S0017089500007588,
     author = {Petrich, Mario},
     title = {Monogenic endomorphisms of a free monoid},
     journal = {Glasgow mathematical journal},
     pages = {87--101},
     year = {1989},
     volume = {31},
     number = {1},
     doi = {10.1017/S0017089500007588},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007588/}
}