Siddique, M., N. Sultana, M. Haque, M. Hossain, and J. Ahmed. “Effects of Twin Scale Size and Hormones on In Vitro Propagation of Hippeastrum (<i>Hippeastrum hybridum</I>)”. Plant Tissue Culture and Biotechnology, vol. 16, no. 2, Sept. 2008, pp. 105-10, doi:10.3329/ptcb.v16i2.1111.