Akçin, Öznur E. and Binzet, R. 2010. The micromorphological and anatomical properties of <i>Onosma angustissimum</i> Hausskn. & Bornm. and <i>O. cassium</i> Boiss. (Boraginaceae). Bangladesh Journal of Plant Taxonomy. 17, 1 (Jun. 2010), 1–8. DOI:https://doi.org/10.3329/bjpt.v17i1.5386.