Simadibrata, Marcellus, et al. “Combination Treatment in Ulcerative Colitis Using 5-Aminosalysilic Acid (5-ASA) and Polysaccharide Peptide of Indonesian Ganoderma Lucidum Mycelium Extract”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, vol. 24, no. 1, Apr. 2023, pp. 2-11, doi:10.24871/24120232-11.