P. ANAND, K. P. SINGH, K. V. PRASAD, C. KAUR, and A. K. VERMA, “Betalain estimation and callus induction in different explants of Bougainvillea spp”., Indian J Agri Sci, vol. 87, no. 2, pp. 191–196, Feb. 2017, doi: 10.56093/ijas.v87i2.67564.