Vasanthy, G., B.S. Venkatachala, and S.A.J. Pocock. “The Evolution of Angiospermid Pollen Characteristics: Conjectures and Queries”. Journal of Palaeosciences 38 (December 31, 1989): 131–146. Accessed November 23, 2024. https://jpsonline.co.in/index.php/jop/article/view/1647.