>In fact, my equations were very bad and only CERN library could >handle. That is why I trust this library. Thank u for your reply, can u tell me where can I download this. Thank u very much Tran thai Dang Ehime University Tel: (089)-927-9818 Home Tel/Fax: (089)-932-3182 Home page http://www.coe.ehime-u.ac.jp/~Tdang/dang.htm E-mail: Tdang@coe.ehime-u.ac.jp