Kabat, Eliza Zofia, et al. “PASSIVE SMARTPHONE SENSING FOR MENTAL HEALTH MONITORING: A STRUCTURED REVIEW OF BEHAVIORAL BIOMARKERS, PREDICTIVE VALIDITY, AND ETHICAL RISKS”. International Journal of Innovative Technologies in Social Science, vol. 1, no. 4(52), Oct. 2026, https://doi.org/10.31435/ijitss.4(52).2026.6268.