Kaushal, S. S.; Likens, G. E.; Utz, R. M.; Pace, M. L.; Grese, M.; Yepsen, M. (2013). "Increased river alkalinization in the Eastern U.S". Environmental Science & Technology: 130724203606002. doi:10.1021/es401046s.
epa.gov
water.epa.gov
"Total Alkalinity". United States Environment Protection Agency. Hentet 6. marts 2013.
web.archive.org
"Alkalinity". The WQA Glossary of Terms. 31. marts 2000. Arkiveret fra originalen 24. december 2013. Hentet 6. marts 2013.
wqa.org
"Alkalinity". The WQA Glossary of Terms. 31. marts 2000. Arkiveret fra originalen 24. december 2013. Hentet 6. marts 2013.