Novel continuous ultrasonic contactor system for CO2 absorption: Parametric and optimization study - Yusof, Siti Munirah Mhd; Lau, Kok Keong; Shariff, Azmi Mohd; Tay, Wee Horng; Mustafa, Nur Farhana Ajua; Lock, Serene Sow Mun (Elsevier, 2019)