● Stanton TB,Jensen NS,Casey TA,Tordoff LA,Dewhirst FE,Paster BJ (1991). Reclassification of Treponema hyodysenteriae and Treponema innocens in a new genus, Serpula gen. nov., as Serpula hyodysenteriae comb. nov. and Serpula innocens comb. nov.
Int. J. Syst. Bacteriol. 41, 50-8.
● Stanton TB (1992). Proposal to change the genus designation Serpula to Serpulina gen. nov. containing the species Serpulina hyodysenteriae comb. nov. and Serpulina innocens comb. nov.
Int. J. Syst. Bacteriol. 42, 189-90.
● Ochiai S,Adachi Y,Mori K (1997). Unification of the genera Serpulina and Brachyspira, and proposals of Brachyspira hyodysenteriae Comb. Nov., Brachyspira innocens Comb. Nov. and Brachyspira pilosicoli Comb. Nov.
Microbiol. Immunol. 41, 445-52.
● Kinyon JM,Harris DL (1979). Treponema innocens, a new species of intestinal bacteria and emended description of the type strain of Treponema hyodysenteriae Harris et al.
Int. J. Syst. Bacteriol. 29, 102-109.