Fernando, E S, M O Quimado, L C Trinidad, and A I Doronila. 2013. “The Potential Use of Indigenous Nickel Hyperaccumulators for Small-Scale Mining in The Philippines”. Journal of Degraded and Mining Lands Management 1 (1). Malang, Indonesia:21-26. https://doi.org/10.15243/jdmlm.2013.011.021.