1. Gas sampling requirements for baseline well-water testing for coalbed methane/natural gas in coal operations,2006
2. EUB Directive 035. Baseline water well testing requirement for coalbed methane wells completed above the base of groundwater protection,2006
3. Standard for baseline water-well testing for coalbed methane/natural gas in coal operations,2006
4. An integrated statistical-graphical approach for the appraisal of the natural background levels of some major ions and potentially toxic elements in the groundwater of Urmia aquifer;Amiri;Iran. Environ. Earth Sci.,2021
5. Assessing background values of chloride, sulfate and fluoride in groundwater: a geochemical-statistical approach at a regional scale;Biddau;J. Geochem. Explor.,2017