B. Nanda, S. N. Mishra, L. Dash, and R. Mohanty, “Effect of Yoga as an Add-On Therapy for Negative and Cognitive Symptoms in Patients with Schizophrenia—A Randomized Controlled Trial”, Al-Rafidain J Med Sci, vol. 10, no. 2, pp. 258–264, May 2026.