Ismed, F. et al. 2020. Phytochemical study of ethyl acetate fraction from lichen Stereocaulon massartianum Hue. and antibacterial activity assay with TLC-bioautography method. Jurnal Sains Farmasi & Klinis. 7, 2 (Aug. 2020), 164–171. DOI:https://doi.org/10.25077/jsfk.7.2.164-171.2020.