1. ^{{cite journal | vauthors = Priefert H, Hein S, Krüger N, Zeh K, Schmidt B, Steinbüchel A | title = Identification and molecular characterization of the Alcaligenes eutrophus H16 aco operon genes involved in acetoin catabolism | journal = Journal of Bacteriology | volume = 173 | issue = 13 | pages = 4056–71 | date = July 1991 | pmid = 2061286 | pmc = 208054 | doi = 10.1128/jb.173.13.4056-4071.1991 }}
2. ^{{cite journal | vauthors = Oppermann FB, Steinbüchel A | title = Identification and molecular characterization of the aco genes encoding the Pelobacter carbinolicus acetoin dehydrogenase enzyme system | journal = Journal of Bacteriology | volume = 176 | issue = 2 | pages = 469–85 | date = January 1994 | pmid = 8110297 | pmc = 205071 | doi = 10.1128/jb.176.2.469-485.1994 }}
3. ^{{cite journal | vauthors = Krüger N, Oppermann FB, Lorenzl H, Steinbüchel A | title = Biochemical and molecular characterization of the Clostridium magnum acetoin dehydrogenase enzyme system | journal = Journal of Bacteriology | volume = 176 | issue = 12 | pages = 3614–30 | date = June 1994 | pmid = 8206840 | pmc = 205551 | doi = 10.1128/jb.176.12.3614-3630.1994 }}
4. ^{{cite journal | vauthors = Huang M, Oppermann FB, Steinbüchel A | title = Molecular characterization of the Pseudomonas putida 2,3-butanediol catabolic pathway | journal = FEMS Microbiology Letters | volume = 124 | issue = 2 | pages = 141–50 | date = December 1994 | pmid = 7813883 | doi = 10.1111/j.1574-6968.1994.tb07276.x }}
5. ^{{cite journal | vauthors = Huang M, Oppermann-Sanio FB, Steinbüchel A | title = Biochemical and molecular characterization of the Bacillus subtilis acetoin catabolic pathway | journal = Journal of Bacteriology | volume = 181 | issue = 12 | pages = 3837–41 | date = June 1999 | pmid = 10368162 | pmc = 93865 }}