Combined effects of hydrogen and TiO2 nanoparticle additive on terebinth oil biodiesel operated diesel engineAhmet Çalık, Erdi Tosun, Mustafa Atakan Akar and Mustafa ÖzcanlıSci. Tech. Energ. Transition, 78 (2023) 9DOI: https://doi.org/10.2516/stet/2023007