1. APHA (1998). Standard methods for the examination of water and wastewater p. 1162. Washington, DC: American Public Health Association.
2. Åström, M., & Bjorklund, A. (1995). Impact of acid sulfate soils on stream water geochemistry in western Finland. Journal of Geochemical Exploration, 55, 163–170.
3. Cravotta, C. A., & Trahan, M. K. (1999). Limestone drains to increase pH and remove dissolved metals from acidic mine drainage. Applied Geochemistry, 14, 581–606.
4. Cravotta, C. A., & Watzlaf, G. R. (2002). Design and performance of limestone drains to increase pH and remove metals from acidic mine drainage. In D. L. Naftz, S. J. Morrison, J. A. Davis, & C. C. Fuller (Eds.), Handbook of groundwater remediation of trace metals, radionuclides, and nutrients with permeable reactive barriers (pp. 19–66). San Diego, CA: Academic.
5. Evangelou, V. P. (1995). Pyrite oxidation and its control: Solution chemistry, surface chemistry, acid mine drainage (AMD), molecular oxidation mechanisms, microbial role, kinetics, control, ameliorates and limitations p. 293. Boca Raton, FL: CRC.