Antibacterial and antioxidant activities of ethanolic and water extracts of stingless bees Tetrigona binghami, Heterotrigona itama, and Geniotrigona thoracica propolis found in Brunei - Zullkiflee, Nadzirah; Taha, Hussein; Abdullah, Nurul Aliah; Hashim, Fatimah; Usman, Anwar (Philippine Journal of Science)