Y. . Pujiastuti, E. . Indriani, A. Muslim, C. . Irsan, and A. . Arsi, “Effectivity of Bacillus thuringiensis from Soil in Freshwater Swamps against Epilachna sp. Larvae ”, J. Lahan Suboptimal, vol. 10, no. 1, pp. 46–53, Apr. 2021.