O. Farobie, “Valorization of Ulva lactuca via hydrothermal carbonization: Effects of temperature, time, and concentration on hydrochar: Valorisasi Ulva lactuca melalui karbonisasi hidrotermal: Pengaruh suhu, waktu, dan konsentrasi terhadap hidrokar”, JPHPI, vol. 29, no. 2, pp. 161–177, Mar. 2026, doi: 10.17844/f3kztf96.