‘CEN: Avenue Marnix 17, 1000 Brussels, Belgium, tel. +32 2550 08 11, fax +32 2550 08 19 (http://www.cen.eu/cenorm/homepage.htm)
«CEN: avenue Marnix 17, 1000 Bruxelles, BELGIQUE; Tél. + 32 25500811, fax + 32 25500819 http://www.cen.eu/cenorm/homepage.htm