Chen Dong Jifang Li Lifeng Xi Jie Hao Ran Jin Improvement of an Image Encryption Algorithm Based on Combined Multidimensional Chaotic Systems. 209-216 2007 conf/kes/2007-2 KES (2) http://dx.doi.org/10.1007/978-3-540-74827-4_27 db/conf/kes/kes2007-2.html#DongLXHJ07