Butler W.R., Kilburn J.O., Kubica J.P. High-performance liquid chromatography analysis of mycolic acids as an aid in laboratory identification of Rhodococcus and Nocardia species. J. Clin. Microbiol. 1987. Vol. 25, No. 11. P. 2126–2131. DOI: 10.1128/jcm.25.11.2126-2131.1987.