@article{10_1090_S0894_0347_1992_1149891_3,
     author = {Bielefeld, Ben and Fisher, Yuval and Hubbard, John},
     title = {The classification of critically preperiodic polynomials as dynamical systems},
     journal = {Journal of the American Mathematical Society},
     pages = {721--762},
     publisher = {mathdoc},
     volume = {05},
     number = {4},
     year = {1992},
     doi = {10.1090/S0894-0347-1992-1149891-3},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1992-1149891-3/}
}