The 2012 super frequency list : broadcast and utility / ed. Klingenfuss Publications
Telco 2010 : emerging telecommunication landscapes: the cards are reshuffled / Detecon International
European postal services : 7th annual conference: 8th,9th & 10th March 2004, Hotel Okura, Amsterdam / org. The Institute of Economic Affairs
2018 Super frequency list : broadcast and utility / ed. Klingenfuss Publications