1. Directive 94/9/EC of the European Parliament and the Council, March 23, 1994, on the approximation of the laws of the member states concerning equipment and protective systems intended for use in potentially explosive atmospheres;“Atex 100a” Directive,1994
2. Australian Standard AS 2381.10-1995: Electrical Equipment for Explosive Atmospheres. Selection, Installation and Maintenance, Part 10: Equipment in Combustible Dust (Class II) Areas;Australian standard,1995
3. Explosionsschutz;Bartknecht,1993
4. Einsatz von Arbeitsmitteln in staubexplosionsgefährdeten Bereichen. Zoneneinteilung und Gerätekategorien;Beck,2002