Petroleum and natural gas industries - Cements and materials for well cementing - Part 6: Methods for determining the static gel strength of cement formulations (ISO 10426-6:2008); English version EN ISO 10426-6:2008— 15 стр.
Automotive fuels - Unleaded petrol - Requirements and test methods; German version EN 228:2004, Corrigenda to DIN EN 228:2004-03; German version EN 228:2004/AC:2005— 3 стр.