1. M. Berthelot, On a New Class of Metal Compounds. Ann. Chim. Phys., 4th Series, 1866, 9, p 385-413 in French (Equi Diagram; Experimental)
2. Moissan H. (1898) Sur les Conditions de Formation des Carbures Alcalins, des Carbures Alcalino-Terreux et du Carbure de Magnésium (Formation Conditions of Alkali Carbides, Alkaline Earth Carbides and Magnesium Carbide). Compt. Rend. Hebd. Séances Acad. Sci. 126:302-308 in French (Equi Diagram; Experimental)
3. Moissan H. (1898) Action de l’acétylène sur les Métaux-Ammoniums (Action of Acetylene on Metal Ammoniates). Compt. Rend. Hebd. Séances Acad. Sci. 127:911-917, in French (Equi Diagram; Experimental)
4. Fredenhagen K., Cadenbach G. (1926) Die Bindung von Kalium durch Kohlenstoff (The K-C bond). Z. Anorg. Allg. Chem. 158(3-4):249-263, in German (Equi Diagram; Experimental)
5. Fredenhagen K., Suck H. (1929) Über die Bindung der Alkalimetalle durch Kohlenstoff. II. (On the Combination of Alkali Metals with Carbon. II). Z. Anorg. Allg. Chem. 178(4):353-365, in German (Equi Diagram; Experimental)