Sarwar, A. G., and H. Takahashi. “Pollen Morphology of the Tribe Phyllodoceae (Ericoideae, Ericaceae) and Its Taxonomic Significance”. Bangladesh Journal of Plant Taxonomy, vol. 21, no. 2, Dec. 2014, pp. 129-37, doi:10.3329/bjpt.v21i2.21351.