Hardiansyah, Muhammad Yusril, et al. “Bio-Priming Seeds With PGPR of Bamboo Rhizosphere in Cocoa (Theobroma Cacao L.) Seeds Germination”. International Journal of Scientific Research in Biological Sciences, vol. 7, no. 3, June 2020, pp. 11-18, https://ijsrbs.isroset.org/index.php/j/article/view/361.