A. Sauki, Z. H. Zainal Abidin, N. A. A. Mohd Yazid, N. A. Ghazali, N. K. I. Nik Ab. Lah, and W. Z. Wan Bakar, “Rheological properties and emulsion stability performance of invert emulsion drilling fluid using emulsifier derived from waste cooking oil”, Chemical Engineering Transactions, vol. 112, pp. 229-234, Oct. 2024.