Citrobacter freundii (Braak 1928) Werkman and Gillen 1932 (Approved Lists 1980) Spröer C. Mendrock U. Swiderski J. Lang E. Stackebrandt E. The phylogenetic position of Serratia, Buttiauxella and some other genera of the family Enterobacteriaceae 1999 49 4 1433 1438 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-49-4-1433 10555323 Skerman V.B.D. McGowan V. Sneath P.H.A. Approved Lists of Bacterial Names 1980 30 1 225 420 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-30-1-225