Depression, Anxiety, and Stress Scale-21 (DASS-21): Further psychometric exploration using robust item response theory and classical theory measures among university students - Md Dilshad Manzar; Mohammed Salahuddin; Dejene Nureye; Faizan Z. Kashoo; Majumi M. Noohu; Jazi Shaydied Alotaibi; Majed Sulaiman Alamri; Mark D. Griffiths (PLoS ONE, 2025)