Endecken sie die techniken der besten einkaufsleiter : Ontdek de technieken van de beste inkoopmnagers
2006 Super frequency list : broadcast + utility radio stations / ed. Klingenfuss Publications
2009 Super frequency list : broadcast and utility / ed. Klingenfuss Publications
III Fórum telecom & media : 22 de Setembro de 2004, Lisboa / org. Diàrio Económico