Nguyen , Tat Thang, Kikura Hiroshige, Ngoc Hai Duong, and Murakawa Hideki. 2013. “Study of Bubbly Two-Phase Flows in a Veritical Pipe Using Ultrasound and Image Processing”. Nuclear Science and Technology 3 (3):13-24. https://doi.org/10.53747/nst.v3i3.264.