Khatun, R., A. Islam, and F. Majid. “Study of Water Hyacinth of Bangladesh IV: Comparative Study of Pollen Grains and Development of Seed in Both Long and Short Petioled Forms of <i>Eichhornia crassipes</I> (Mart.) Solms-Laubach”. Bangladesh Journal of Scientific and Industrial Research, vol. 41, no. 3, Aug. 2007, pp. 189-02, doi:10.3329/bjsir.v41i3.289.