Mazur, G., Makowski, M., Sumera, J., & Kowalczyk, K. (2012). Efficient Energy and Electrostatic Properties Calculations at the MP2 Theory Level: A Case Study of Density Matrix-Based Computational Quantum Chemistry. Computing and Informatics, 31(3), 665–673. Retrieved from http://147.213.75.17/ojs/index.php/cai/article/view/1013