Khatun, R., Islam, A. and Majid, F. 2007. 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. 41, 3 (Aug. 2007), 189–202. DOI:https://doi.org/10.3329/bjsir.v41i3.289.