S. S. Sultana, A. R. B. Rahman, and S. S. Alam, “Karyotype analysis with orcein and CMA from leaf base cells of <i>Rauvolfia serpentina</i> Benth. <i>et</i> Kurz”, Bangladesh J. Bot., vol. 38, no. 1, pp. 111–113, May 2010.