I. Ilmi, S. Suherman, E. Frida, N. W. Binti Mohd Zulkifli, and J. Jufrizal, “Mapping the landscape of WCO biolubricant studies: A Comprehensive bibliometric review with vosviewer”, Mech. Eng. for Soc. and Ind., vol. 4, no. 3, pp. 535–555, Dec. 2024, doi: 10.31603/mesi.12549.