@article{JRAM_1997__489_153932,
     author = {V. Chothi and G. Everest and T. Ward},
     title = {S-integer dynamical systems: periodic points.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {99--132},
     publisher = {mathdoc},
     volume = {489},
     year = {1997},
     zbl = {0879.58037},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1997__489_153932/}
}