Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamp caps (IEC 60061-1:1969 + supplements A:1970 to V:1997 + A21:1998 to A35:2004, modified); German version EN 60061-1:1993 + A1:1995 to A7:1997 + A21:1998 to A35:2005— 342 стр.
Tungsten halogen lamps (non-vehicle) - Performance specifications (IEC 60357:2002, modified); German version EN 60357:2003 + Corrigendum July 2003— 166 стр.