I. P. Erkara, O. Koyuncu, M. Ardic, and O. K. Yaylaci, “Anatomy and palynology of endemic <i>Stachys iberica</i> Bieb. Subsp. <i>Iberica</i> var. <i>densipilosa</i> Bhattacharjee (Lamiaceae) from Turkey”, Bangladesh J. Bot., vol. 39, no. 2, pp. 131–136, Mar. 2011.