Sahari, I. S., Assim, Z., Ahmad, F. B. and Jusoh, I. B. (1) “Essential Oils from Fresh Fruits, Fruit Stalks and Stem Barks of Four Piper nigrum Varieties from Sarawak”, Borneo Journal of Resource Science and Technology, 3(1), pp. 43-51. doi: 10.33736/bjrst.255.2013.