E. A. . Saputro, R. R. . Yogaswara, N. . Arviana, L. . Aini, A. Y. . Sunarti, and R. E. . Nugraha, “Mass Balance Analysis of Bioethanol Production from Petai Peel (Parkia speciosa) through Enzymatic Process”, ijeise, vol. 2, no. 2, Sep. 2023.