Maikami, Mattanaporn. “Effect of soil containing coffee grounds on germination and growth of water convolvulus seedling”. Journal of Science and Science Education (JSSE) 4, no. 2 (September 14, 2021): 155–163. accessed April 6, 2025. https://so04.tci-thaijo.org/index.php/JSSE/article/view/252763.