Hardiko, M.H. et al. 2024. Studi pengaruh waktu dan suhu recovery limbah katalis nikel terpakai (spent catalyst) pasca proses hidrogenasi RBDPO dengan metode kalsinasi. Journal of Innovation Materials, Energy, and Sustainable Engineering. 1, 2 (Jan. 2024). DOI:https://doi.org/10.61511/jimese.v1i2.2024.562.