V. HETMANENKO, S. KRYLACH, Y. SKRYLNYK, M. POPIRNY, and A. KUTOVA, “BIOCHAR FROM PULP AND PAPER MILL SLUDGE: CO-PYROLYSIS WITH BENTONITE, NUTRIENT RETENTION AND LEACHABILITY”, AGROLIFE SCI J, vol. 14, no. 1, pp. 58–65, Jun. 2025.