M. G. Goesten, C. Fonseca Guerra, F. Kapteijn, J. Gascon, F. M. Bickelhaupt
Six-coordinate Group-13 Complexes: Role of d Orbitals and Electron-Rich Multi-center Bonding
Angew. Chem. 2015, 127, 12202-12206; Angew. Chem. Int. Ed. 2015, 54, 12034-12038
(see als cover in German edition and cover in English edition).