Brebbia CA, Popov V (eds.): Environmental Health Risk III. WIT Transactions on Biomedicine and Health, volume 9; WIT Press, Ashurst; pp. 397-404; ISBN 978-1-84564-026-2
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