Saleh, Ibrahim E. Hassan. “FMRI Resting State Time Series Causality: Comparison of Granger Causality and Phase Slope Index”. International Journal of Research in Medical Sciences 2, no. 1 (January 20, 2017): 47–58. Accessed October 9, 2025. https://www.msjonline.org/index.php/ijrms/article/view/2053.