Combating sexual orientation discrimination in employment: legislation in fifteen EU member states : report of the European Group of Experts on Combating Sexual Orientation Discrimination about the implementation up to April 2004 of Directive 2000/78/EU establishing a general framework for equal treatment in employment and occupation - Waaldijk, Kees; Bonini Baraldi, Matteo; Littler, Alan (Universiteit Leiden, 2004)