Noviyanto, A., P. Purwanto, S. Minardi, and S. Supriyadi. “The Assessment of Soil Quality of Various Age of Land Reclamation After Coal Mining: A Chronosequence Study”. Journal of Degraded and Mining Lands Management, vol. 5, no. 1, Oct. 2017, pp. 1009-18, doi:10.15243/jdmlm.2017.051.1009.