Qi Wang Yong Chen Generalized Q-S (lag, anticipated and complete) synchronization in modified Chua's circuit and Hindmarsh-Rose systems. 48-56 2006 181 Applied Mathematics and Computation 1 http://dx.doi.org/10.1016/j.amc.2006.01.017 db/journals/amc/amc181.html#WangC06b