F. Abascal, R. Zardoya, and D. Posada, ProtTest: selection of best-fit models of protein evolution, Bioinformatics, vol.21, pp.2104-2105, 2005.

A. Bellelli and M. Brunori, Hemoglobin allostery: Variations on the theme, Biochimica et Biophysica Acta (BBA) -Bioenergetics, vol.1807, pp.1262-1272, 2011.