Sanderson, R. T. (1983). «Electronegativity and Bond Energy». Journal of the American Chemical Society105 (8): 2259-2261. doi:10.1021/ja00346a026.
Allen, F. H.; Kennard, O.; Watson, D. G.; Brammer, L.; Orpen, A. G.; Taylor, R. (1987). «Table of Bond Lengths Determined by X-Ray and Neutron Diffraction». J. Chem. Soc., Perkin Trans. 2 (12): S1-S19. doi:10.1039/P298700000S1.
Orpen, A. Guy; Brammer, Lee; Allen, Frank H.; Kennard, Olga; Watson, David G.; Taylor, Robin (1989). «Supplement. Tables of bond lengths determined by X-ray and neutron diffraction. Part 2. Organometallic compounds and co-ordination complexes of the d- and f-block metals». Journal of the Chemical Society, Dalton Transactions (12): S1. doi:10.1039/DT98900000S1.
Beatriz Cordero, Verónica Gómez, Ana E. Platero-Prats, Marc Revés, Jorge Echeverría, Eduard Cremades, Flavia Barragán and Santiago Alvarez. Covalent radii revisited. Dalton Trans., 2008, 2832-2838, doi10.1039/b801115j
P. Pyykkö, M. Atsumi, Chemistry: A European Journal,Chem. Eur. J., 15, 2009,186-197 doi10.1002/chem.200800987
P. Pyykkö, M. Atsumi, Chemistry: A European Journal, Chem. Eur. J., 15, 2009,12770–12779 doi10.1002/chem.200901472.
P. Pyykkö, S. Riedel, M. Patzschke, Chemistry: A European Journal, Chem. Eur. J., 11, 2005,3511–3520 doi10.1002/chem.200401299.