2000 Materials Research Society (MRS) Fall meeting, page. 149, 2000-11-27
The 3rd International Symposium on the Advanced Functional Materials in the North-East Region, 2000-10-10
2001 Materials Research Society (MRS) Fall meeting, page. 205, 2001-11-26
International Workshop on Nitride Semiconductors (IWN 2002), page. 235, 2002-07-22