Ludwig, W.; Schleifer, K.-H., and Whitman, W.B. (In press, release in 2009). "Revised road map to the phylum Firmicutes". In P. De Vos et al. (eds.) Bergey's Manual of Systematic Bacteriology, 2nd ed., vol. 3 (The Firmicutes). Springer-Verlag, New York. ISBN0-387-95041-9Revised Road Map to the Phylum Firmicutes보관됨 2010-09-21 - 웨이백 머신
Ludwig, W.; Schleifer, K.-H., and Whitman, W.B. (In press, release in 2009). "Revised road map to the phylum Firmicutes". In P. De Vos et al. (eds.) Bergey's Manual of Systematic Bacteriology, 2nd ed., vol. 3 (The Firmicutes). Springer-Verlag, New York. ISBN0-387-95041-9Revised Road Map to the Phylum Firmicutes보관됨 2010-09-21 - 웨이백 머신