Rahayu, L., V. Yuliana, M. B. Budiono, A. Riznaldhy, and R. Kurniarina. “Green Coal Machine: Innovative Solution for Processing Organic Soil Enhancer from Compost and Coal Testing Waste”. Journal of Applied Electrical Engineering, Vol. 7, no. 2, Dec. 2023, pp. 91-96, doi:10.30871/jaee.v7i2.6775.