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McDonagh, James L.; Vincent, Mark A.; Popelier, Paul L.A. (October 2016). “Partitioning dynamic electron correlation energy: Viewing Møller-Plesset correlation energies through Interacting Quantum Atom (IQA) energy partitioning”. Chemical Physics Letters662: 228–234. Bibcode: 2016CPL...662..228M. doi:10.1016/j.cplett.2016.09.019.