S. Sugiyarto, I. . Harlianingtyas, C. . Triwidiarto, dan S. Supriyadi, “Pembuatan Biochar, Bio-Oil, dan Arang Aktif sebagai Income Generating TEFA Pembibitan Mendukung Badan Layanan Umum Politeknik Negeri Jember: Production of Biochar, Bio-Oil, and Activated Charcoal as Income Generating TEFA Nursery to Supports the Public Service Agency of Jember State Polytechnic ”, ppm, vol. 6, no. 1, hlm. 214–219, Jan 2024.