↑Parker, Charles Thomas; Garrity, George M (1 January 2003). Parker, Charles Thomas; Garrity, George M. (eds.). "Taxonomic Abstract for the genera". The NamesforLife Abstracts. doi:10.1601/tx.30792.
↑Garrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. ISBN978-0-387-24145-6.