ASTM International Standard Test Method for Biological Clogging of Geotextile or Soil/Geotextile Filters. West Conshohocken, PA:ASTM International;ASTM Standard Test Method D 1987-95 (Reapproved 2002).
Plastics--Evaluation of the action of micro-organisms. Geneva (Switzerland):International Organization for Standardization/ANSI;ISO ISO 846:1997.
Plastics - Evaluation of the action of microorganisms. London, UK:British Standards Institution;British Standard BS EN ISO 846:1997.