● Urdiain M,López-López A,Gonzalo C,Busse HJ,Langer S,Kämpfer P,Rosselló-Móra R (2008). Reclassification of Rhodobium marinum and Rhodobium pfennigii as Afifella marina gen. nov. comb. nov. and Afifella pfennigii comb. nov., a new genus of photoheterotrophic Alphaproteobacteria and emended descriptions of Rhodobium, Rhodobium orientis and Rhodobium gokarnense. Syst. Appl. Microbiol.31, 339-51.