Beatrice, C. L., A. Giuliani, and A. Colosimo. “Allosteric Transitions of Proteins Studied by Topological Networks: A Preliminary Investigation on Human Hemoglobin”. Biophysics and Bioengineering Letters, vol. 5, no. 1, June 2012, https://rosa.uniroma1.it/rosa00/index.php/biophysics_and_bioengineering/article/view/10475.