Karakuła, Hanna, Marta Flis, Kinga Szymona, and Magdalena Studenna. “Kynurenic Acid and Positive Symptoms in Schizophrenia”. Current Problems of Psychiatry 12, no. 4 (February 7, 2012): 516–519. Accessed August 2, 2025. https://czasopisma.umlub.pl/cpp/article/view/2656.