1. Proceedings of the International Conference on Phenomena in Ionized Gases (ICPIG XIII) Toulouse [Invited talk];Kogelschatz,1997
2. Proceedings of the 2nd Asia-Pacific Conference on Plasma Science and Technology, Daejeon;Xu,1994
3. Proceedings of the 12th International Conference on Gas Discharges and Their Applications, Greifswald;Pietsch,1997