Kangsopa, J., and P. Jeephet. “Effects of Seed Priming with Caffeine on Germination, Vigour and Seedling Growth of Pepper”. Burapha Science Journal, vol. 26, no. 3 September-December, Mar. 2026, pp. 1655-69, https://li05.tci-thaijo.org/index.php/buuscij/article/view/1394.