European Commission. (2001). ATEX guidelines: Guidelines on the application of the European Parliament and Council Directive 94/9/EC of 23 March 1994 on the approximation of the laws of the member states concerning equipment and protective systems intended for use in potentially explosive atmospheres. Luxembourg: Office for Official Publications of the European Communities.

European Commission. ATEX Guidelines: Guidelines On the Application of the European Parliament and Council Directive 94/9/EC of 23 March 1994 On the Approximation of the Laws of the Member States Concerning Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres. Luxembourg: Office for Official Publications of the European Communities, 2001.

European Commission. ATEX Guidelines: Guidelines On the Application of the European Parliament and Council Directive 94/9/EC of 23 March 1994 On the Approximation of the Laws of the Member States Concerning Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres. Luxembourg: Office for Official Publications of the European Communities, 2001.