Part
Brenner, D.J., Krieg, N.R. & Staley, J.T.
2005. Volume Two. The Proteobacteria. Part C. The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. In G.M. Garrity (ed.), Bergey's Manual of Systematic Bacteriology, Second Edition. Springer-Verlag, New York: [i]-xxviii, 1-1388.
Keywords
Alphaproteobacteria; Betaproteobacteria; Deltaproteobacteria; Epsilonproteobacteria