Tong Zhou Mingyan Yu Yizheng Ye A Pipelined Switched-Current Chaotic System for the High-Speed Truly Random Number Generation in Crypto Processor. 216-221 2006 conf/vlsid/2006 VLSI Design http://doi.ieeecomputersociety.org/10.1109/VLSID.2006.21 db/conf/vlsid/vlsid2006.html#ZhouYY06