Krishnakumar, G., K. P. Dintu, S. C. Varghese, D. S. Nair, G. Gopinath, K. B. Rameshkumar, K. Satheeshkumar, and P. N. Krishnan. “Ophiorrhiza, a Promising Herbaceous Source of the Anticancer Compound Camptothecin”. Plant Science Today, vol. 7, no. 2, May 2020, pp. 240-5, doi:10.14719/pst.2020.7.2.660.