KAVAN, Ladislav, HEIMANN, R. B. Other Natural Carbynoid Structures. In: HEIMANN, R. B., EVSYUKOV, S. E., KAVAN, L., eds. Carbyne and Carbynoid Structures. Dordrecht: Kluwer Academic, 1999, s. 31-38. Physics and Chemistry of Materials with Low-Dimensional Structures., 21. ISBN 0-7923-5323-4.