Kameran adnan, Suzan, Feza Shalal Neda, and Bassam T. Al-Gailani. “The Influence of the Digital Pulse Wave Reference Point on the Pulse Transit Time Measurement and Variability”. Samarra Journal of Pure and Applied Science 5, no. 3 (September 30, 2023): 108–114. Accessed March 16, 2025. https://sjpas.com/index.php/sjpas/article/view/504.