1. Encyclopédie Methodique, Ed. Paris 1796.
2. Structural Inorganic Chemsitry, 4th ed., Clarendon Press, Oxford 1975.
3. Interstitial carbides of other compositions than MC with partiallyfilled octahedral interstices (e.g. Nb2C) are also known.
4. Not all carbides of 4f and 5f elements contain C2 dumbbells,for example Ho2C or UC. The latter are counted among interstitialcarbides.
5. Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)