Dzulhelmy bin Amari, Mohamad, et al. “Optimization of Velocity Flap Structures in High Sensitivity Macrofluidic Airflow Sensor”. International Journal of Engineering & Technology, vol. 7, no. 4.27, Nov. 2018, pp. 11-15, https://doi.org/10.14419/ijet.v7i4.27.22428.