Här anges det av IUPAC rekommenderade standardvärdet. Se: Michael E. Wieser, Tyler B. Coplen: Atomic weights of the elements 2009 (IUPAC Technical Report). In: Pure and Applied Chemistry. 2010, S. 1, doi:10.1351/PAC-REP-10-09-14.
Haaland, D (1976). ”Graphite-liquid-vapor triple point pressure and the density of liquid carbon”. Carbon 14 (6): sid. 357. doi:10.1016/0008-6223(76)90010-5.
Savvatimskiy, A (2005). ”Measurements of the melting point of graphite and the properties of liquid carbon (a review for 1963–2003)”. Carbon 43 (6): sid. 1115. doi:10.1016/j.carbon.2004.12.027.
Simon MD, Geim AK (2000): Diamagnetic levitation: Flying frogs and floating magnets. Journal of Applied Physics 87, S. 6200–6204 (doi:10.1063/1.372654).
