A. Setiawan, P. Puspitasari, M. . Tauviqirrahman, D. D. Pramono, and H. Salam, “Performance analysis of soybean oil with CuO/Graphene hybrid additive nanoparticles as cutting fluid on CNC machining processes”, Teknomekanik, vol. 8, no. 2, pp. 136–163, Nov. 2025, doi: 10.24036/teknomekanik.v8i2.42472.