Yin, Tan Ying, Farhanahani Mahmud, and Nur Ilyani Ramli. 2018. “Near-Infrared Spectroscopy (NIRS)-Based Digit Skin Tissue Blood Flow Measurement System”. International Journal of Engineering & Technology 7 (4.30): 131-35. https://doi.org/10.14419/ijet.v7i4.30.22076.