D. A. Gunawan, F. G. Nugroho, O. Kristiawan, Y. Yusmaniar, and M. Wulandari, “Analysis of the Effect of LEP-01 Pour Point Depressant on Crude Oil Viscosity Using Rotational Rheology”, Jurnal Riset Sains dan Kimia Terapan, vol. 9, no. 1, pp. 45–49, Jun. 2023.