Reference - Nakazawa, F., Poco, S.E., Ikeda, T., Sato, M., Kalfas, S., Sundqvist, G., Hoshino, E. (1999). Cryptobacterium curtum gen nov., sp. nov., a new genus of Gram-positive anaerobic rod isolatated from human oral cavities. Int. J. syst. Bact. 49, 1193-1200.