1) KRAINSKY, A.: Die Aktinomyceten und ihre Bedeutung in der Natur. Zentr. Bakteriol. Parasitenk. Abt. II, 41: 649-688, 1914
2) PRIDHAM, T. G.; C. W. HESSELTINE & R. G. BENEDICT: A guide for the classification of streptomycetes according to selected groups. Appl. Microbiol. 6: 52-79, 1958
3) TRESNER, H. D. & E. J. BACKUS: System of color wheels for Streptomycete taxonomy. Appl. Microbiol. 11: 335-338, 1963
4) RIDGWAY, R.: Color Standards and Color Nomenclature. Published by the author, Washington, D. C., 1912
5) PRIDHAM, T. G. & D. GOTTLIEB: The utilization of carbon compounds by some Actinomycetales as an aid for species determination. J. Bact. 56: 107-114, 1948