Zainudin, Muhammad Hanif Hakimi, and Kamarul Amin Abdullah. 2025. “Petroleum Jelly As an Alternative Coupling Agent to Reduce Umbrella Artifacts in Ultrasound Superficial Scans”. Malaysian Journal of Medicine and Health Sciences 21 (4):138-43. http://mjmhsojs.upm.edu.my/index.php/mjmhs/article/view/1273.