Tungsten halogen lamps (non-vehicle) - Performance specifications (IEC 60357:2002, modified); German version EN 60357:2003 + Corrigendum July 2003— 166 стр.
Characteristics of electric infra-red emitters for industrial heating - Part 1: Short wave infra-red emitters (IEC 60240-1:1992); German version EN 60240-1:1994— 7 стр.