Paul L.A. Popelier--Quantum Chemical Topology

M. Kohout--Electron Pairs in Position Space

Sason Shaik, David Danovich, Benoit Braida, Wei Wu, and Philippe C. Hiberty--New Landscape of Electron-Pair Bonding: Covalent, Ionic, and Charge-Shift Bonds

Bernard Silvi--The Relevance of the ELF Topological Approach to the Lewis, Kossel, and Langmuir Bond Model

Andrés Falceto and Santiago Alvarez--Comparison of the Cr-Cr Quadruple and Quintuple Bonding Mechanisms