6Bradshaw A.D. Restoration of mined lands-Using natural process. Ecological Engineering, 1997, 8: 255~269.
7Dobson A.P, Bradshaw A.D, Baker A.J.M. Hopes for the future: Restoration ecology and conservation biology. Science,1997, 277: 515~522.
8Skousen J.G., Call C.A., Knight R.W. Natural revegetation of an unreclaimed lignite surface mine in east-central Texas (USA). Southwestern Naturalist, 1990, 35: 434~440.
9Cherry D.S., Currie R.J., Soucek D.J, et al. An integrative assessment of a watershed impacted by abandoned mined land discharges. Environmental Pollution, 2001, 111: 377~388.
10Carlson C.L, Adriano D.C. Environmental impacts of coal combustion residues. Journal of Environmental Quality, 1993, 22(2): 227~247.