Don J. Brenner, Noel R. Krieg, James T. Staley, George M. Garrity, David R. Boone, Paul De Vos, Michael Goodfellow, Fred A. Rainey et Karl-Heinz Schleifer, Bergey's Manual® of Systematic Bacteriology, (ISBN978-0-387-24144-9, DOI10.1007/0-387-28022-7, lire en ligne)
M. Pilar Francino, Scott R. Santos et Howard Ochman, Phylogenetic Relationships of Bacteria with Special Reference to Endosymbionts and Enteric Species, New York, NY, Springer New York, , 41–59 p. (ISBN978-0-387-25496-8, DOI10.1007/0-387-30746-x_2, lire en ligne)