Wahyudi, Wahyudi. “Correlation of The Physical Properties of Nyamplung Oil-Based Biodiesel: Density, Viscosity, Calorific Value, and Flash Point”. Journal Research of Social Science, Economics, and Management, vol. 4, no. 10, May 2025, pp. 1295-06, doi:10.59141/jrssem.v4i10.840.