A Note on Entanglement of Formation and Generalized Concurrence
  We discuss a kind of generalized concurrence for a class of high dimensional quantum pure states such that the entanglement of formation is a monotonically increasing convex function of the generalized concurrence. An analytical expression of the entanglement of formation for a class of high dimensional quantum mixed states is obtained. 
Shao-Ming Fei, Zhi-Xi Wang, Hui Zhao