Tong Zhou Zhibo Zhou Mingyan Yu Yizheng Ye Design of A Low Power High Entropy Chaos-Based Truly Random Number Generator. 1955-1958 2006 conf/apccas/2006 APCCAS http://dx.doi.org/10.1109/APCCAS.2006.342244 db/conf/apccas/apccas2006.html#ZhouZYY06