Saleh Sayyad Delshad Mohammadtaghi Hamidi Beheshti Generalized projective synchronization of the fractional-order hyperchaotic Lorenz systems via a vector transmitted signal. 10-15 2010 CCE http://dx.doi.org/10.1109/ICEEE.2010.5608673 conf/iceee/2010 db/conf/iceee/iceee2010.html#DelshadB10