Monogamous property of generalized W states in three-qubit systems in   terms of relative entropy of entanglement
  Because of the difficulty in getting the analytic formula of relative entropy of entanglement, it becomes troublesome to study the monogamy relations of relative entropy of entanglement for three-qubit pure states. However, we find that all generalized W states have the monogamous property for relative entropy of entanglement by calculating the relative entropy of entanglement for the reduced states of the generalized W states in three-qubit systems. 
Zhen Wang, Xiu-Hong Gao and Zhi-Xi Wang
quant-ph