Ramli, S.; Kamil, R.; Ahmad, S. A.; Mohtaruddin, N.; Mahmud, R. Wavelet Transform Based Features of Skin Blood Flow Response Signal for Pressure Ulcer Evaluation. J. Mech. Eng. Sci. 2020, 14 (3), 7309-7318. https://doi.org/10.15282/jmes.14.3.2020.29.0574.