@ARTICLE{Li:ReturnMapAttack:IJBC2006, author = {Shujun Li and Guanrong Chen and Gonzalo \'{A}lvarez}, title = {Return-Map Cryptanalysis Revisited}, journal = {International Journal of Bifurcation and Chaos}, year = {2006}, volume = {16}, number = {5}, pages = {1557-1568}, doi = {10.1142/S0218127406015507}, note = {preprint available online at \url{http://www.hooklee.com/pub.html}} }