Rani, Irma Tya, et al. “PENGARUH TOREFAKSI TERHADAP SIFAT KIMIA PELET TANDAN KOSONG KELAPA SAWIT”. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), vol. 9, no. 2, June 2020, pp. 63-70, doi:10.23960/jtep-l.v9i2.%p.