Chałas, Renata, Dorota Rykwa, and Paweł Łabno. “Artificial Tears and Saliva Substitutes”. Current Issues in Pharmacy and Medical Sciences 25, no. 1 (March 30, 2012): 52–54. Accessed July 6, 2025. https://czasopisma.umlub.pl/curipms/article/view/1471.