P. ANAND, K. P. SINGH, S. K. SINGH, and K. V. PRASAD, “Sucrose and light induced betalain biosynthesis in callus cultures of bougainvillea (Bougainvillea spp.)”, Indian J Agri Sci, vol. 90, no. 9, pp. 1658–1662, Oct. 2020, doi: 10.56093/ijas.v90i9.106587.