● Stackebrandt E,Smida J,Collins MD (1988). Evidence of phylogenetic heterogeneity within the genus Rhodococcus: revival of the genus Gordona (Tsukamura). J. Gen. Appl. Microbiol. 34, 341-348.
● Tsukamura M,Yano I (1985). Rhodococcus sputi sp. nov., nom. rev., and Rhodococcus aurantiacus sp. nov., nom. rev. Int. J. Syst. Bacteriol. 35, 364-368.
● Tsukamura M (1971). Proposal of a new genus, Gordona, for slightly acid-fast organisms occurring in sputa of patients with pulmonary disease and in soil. J. Gen. Microbiol. 68, 15-24.
