If you are using FEAST, please cite the following publications:
  • [1] E. Polizzi, Density-Matrix-Based Algorithms for Solving Eigenvalue Problems, Phys. Rev. B. Vol. 79, 115112 (2009) [link]

  • [2] E. Polizzi, A High-Performance Numerical Library for Solving Eigenvalue Problems: FEAST solver User's guide, (2012) [link]

A mathematical numerical analysis of the FEAST algorithm can now be found in:
  • [3] P. Tang, E. Polizzi, Subspace iteration with Approximate Spectral Projection, (2013) [link]