2005 IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, Beijing, China. volume 1; IEEE: pp. 605-609; ISBN 978-0-7803-9128-4
Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU),
Schriftreihe Reaktorsicherheit und Strahlenschutz, BMU - 2005 - 671: 1-27