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- Sanadi, N.F.A., Y. Van Fan, C.T. Lee, N. Ibrahim, C. Li, Y. Gao, P.Y. Ong, and J.J. Klemes, Nutrient in Leachate of Biowaste Compost and its Availability for Plants. Chemical Engineering Transactions, 2019. 76: p. 1369-1374.
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- Norfakhrina Mohd Noor, N. A. M. R., Ong Pei Ying, Muhamad Helmi bin Nadri, Cheng Kian Kai and Leong Hong Yeng (2018). Influence of Nutrient Management on Crop Yield In Polyculture System. 7th International Conference on Biotechnology for the Wellness Industry, Conferences Proceeding.
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- Pei Ying Ong, C. T. L., Nur Mizatul Hidayah Binti Ismail, Chee Who Leow, Li Yee Lim, Lee Suan Chua and Mohamad Roji Sarmidi (2013). Enzymatic assay for compost from oil palm empty fruit bunch inoculated with Rhodopseudomonas palustris. The 25th Annual Meeting of The Thai Society for Biotechnology and International Conference (TSB,2013). The Emeraid Hotel, Bangkok, Thailand.