Khatun, W., M. M. Ud-Deen, and G. Kabir. “Karyotype of Some Species of <i>Chara</i> and <i>Nitella</I> (Charophyta) from Bangladesh”. Bangladesh Journal of Botany, vol. 38, no. 2, May 2010, pp. 205-7, doi:10.3329/bjb.v38i2.5150.