Suwandhi, I., C. Kusmana, A. Suryani, and T. Tiryana. “Litsea Cubeba Essential Oil Yield Harvested from Different Habitat Types on Mt. Papandayan, West Java, Indonesia”. Journal of Mathematical and Fundamental Sciences, vol. 46, no. 3, Dec. 2014, pp. 269-77, doi:10.5614/j.math.fund.sci.2014.46.3.5.