Comment on: “Chaos in the fractional order unified system and its synchronization” [Journal of the Franklin Institute 345 (2008) 392–401]

Based on Laplace transform theory, chaos synchronization of the fractional order unified system by using the one-way coupling method presented in Xiangjun et al. [Chaos in the fractional order unified system and its synchronization, Journal of the Franklin Institute 345 (2008) 392–401]. In this note, we present some points to the mentioned paper.