www.astm.org American Society for Testing and Materials
www.din.de Deutsches Institut fur Normung
www.elgi.org European Lubricating Grease Institute
www.jsae.or.jp (社)自動車技術会
www.nlgi.org National Lubricating Grease Institute
www.sae.org Society of Automotive Engineers
www.stle.org Society of Tribologists and Lubrication Engineers
www.tribology.jp (社)日本トライボロジー学会