Novák, J Instability of the production of avermectins, sporulation, and pigmentation in Streptomyces avermitilis. [electronic resource] - Canadian journal of microbiology Feb 1993 - 265-7 p. digital Publication Type: Journal Article ISSN: 0008-4166 Standard No.: 10.1139/m93-038 doi Subjects--Topical Terms: Ivermectin--analogs & derivativesMicroscopy, Electron, ScanningPhenotypePigmentation--physiologySpores, Bacterial--physiologyStreptomyces--metabolism