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Aljoe, W. W., & Hawkins, J. W. (1993). Neutralization of acidic discharges from abandoned underground coal mines by alkaline injection. Report of investigations, , 37.
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Álvarez, R., Ordóñez, A., Martínez, T., Loredo, J., Pendás, F., & Younger, P. (2004). (P. Jarvis Adam, A. Dudgeon Bruce, & L. Younger Paul, Eds.). mine water 2004 – Proceedings International Mine Water Association Symposium. 2: University of Newcastle.
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Amacher, M. C., Brown, R. W., Kotuby-Amacher, J., & Willis, A. (1993). Adding sodium hydroxide to study metal removal in a stream affected by acid mine drainage. Research Paper, US Department of Agriculture, Forest Service, 465(17).
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Anonymous. (1994). Gewässerschutz im Tagebau – sauberes Wasser in den Bach. Steinbruch und Sandgrube, 87(4), 32–33.
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Anonymous. (1995). Selecting Mine Drainage Treatment Systems – The USBM's multistep selection method. The engineering and mining journal, 196(10), 24rr.
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