Strain-dependent local empirical pseudopotentials for lattice mismatched   III-V semiconductors, their alloys, heterostructures and nanostructures
  For the latest EPM potentials, please see appendix A in Physical Review B, 59, 15270 (1999) 
A.J. Williamson, J.Kim, L.W. Wang, S.-H. Wei, and A.Zunger