Chatterjee, Reshmi, Satadip Sarkar, and G. M. Narasimha Rao. 2014. “Pollen Morphology and Palynotaxonomical Studies of Common Garden Plants of Apocynaceae, In Kolkata, West Bengal, India”. International Journal of Environment 3 (4):109-16. https://doi.org/10.3126/ije.v3i4.11735.