Proceedings of 2nd Asia-Pacific Engineering Research Forum on Microwaves and Electromagnetic Theory, 1998-10-01
1998 Korea-Japan AP/EMC/EMT Joint Conference Porceedings, page. 165-168, 1998-09-01
USNC/URSI National Radio Science Meeting 1998, page. 281, 1998-06-01
1998 Korea-Japan AP/EMC/EMT Joint Conference Porceedings, page. 165 - 168, 1998-01-01