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), pp. 1–8. doi: 10.3329/bjpt.v17i1.5386.