Thank you for your reply, Oli! my appology that I didn't know there are so many guidelines for the contribution. I'd like to provide evidence for this claim, so will fax you an official letter from KT. I wonder if you can let me know the fax no. or another way to prove it. I'll also edit my article as you mentioned above, but I just want to let you know that I provide references in the reference section, not in the history section.   best,  Alice  