J. A. R. Clugston, C. E. Jeffree, A. Ahrends, and R. R. Mill, “DO ENVIRONMENTAL FACTORS AFFECT THE TAXONOMIC RELIABILITY OF LEAF CUTICULAR MICROMORPHOLOGICAL CHARACTERS? A CASE STUDY IN PODOCARPACEAE”, Edinburgh J. Bot., vol. 74, no. 3, pp. 299–343, Aug. 2017, doi: 10.1017/S0960428617000233.