[7] Wang J, Cui L, Gao W, et al. Geoderma, 2013, 216: 1.
[8] Chen B C, Lai H Y, Juang K W. Ecotoxicology and Environmental Safety, 2012, 80: 393.
[9] Gjorgieva D, Kadifkova-Panovska T, Baceva K, et al. Archives of Environmental Contamination and Toxicology, 2011, 60(2): 233.
[11] Sridhar B B M, Han F, Diehl S, et al. International Journal of Remote Sensing, 2007, 28(5): 1041.
[12] Li Q T, Yang F S, Zhang B, et al. Journal of Remote Sensing, 2008, 12(2): 284.
[17] DONG J, Yu M, Bian Z, et al. Environmental Earth Sciences, 2012, 66(2): 673.
[18] Materazzi S, Canepari S, Aquili S. Environmental Science and Pollution Research, 2012, 19(8): 3292.
[19] Fernandes J, Henriques F. The Botanical Review, 1991, 57(3): 246.