Manzar, M. D., Salahuddin, M., Nureye, D., Kashoo, F. Z., Noohu, M. M., Alotaibi, J. S., Alamri, M. S., Griffiths, M. D. (2025). Depression, Anxiety, and Stress Scale-21 (DASS-21): Further psychometric exploration using robust item response theory and classical theory measures among university students. PLoS ONE. https://doi.org/10.1371/journal.pone.0325238