General purpose lead-acid batteries (valve-regulated types) - Part 1: General requirements, functional characteristics; Methods of test (IEC 61056-1:2002); German version EN 61056-1:2003— 18 стр.
Portable lead-acid cells and batteries (valve-regulated types); part 1: general requirements, functional characteristics, methods of test (IEC 61056-1:1991); German version EN 61056-1:1993— 6 стр.
Secondary cells and batteries for solar photovoltaic energy systems - General requirements and methods of test (IEC 61427:1999); German version EN 61427:2001— 18 стр.
Portable lead-acid cells and batteries (valve-regulated types); part 1: general requirements, functional characteristics, methods of test (IEC 61056-1:1991); German version EN 61056-1:1993— 6 стр.