Do you mean SETOR instead of CETOR? If you are looking for SETOR, send an e-mail to elmo at nrcbsa.bio.nrc.ca to contact Dr. Stephen V. Evans. His phone number was (is?) 613 990-0895 fax: 613 941-4475. Good Luck! -- The following is my automatic signature: Zhan-Yang Zhu Department of Mathematics Stanford University Stanford, CA 94305-2125 Tel: (415) 723 2221 Fax: (415) 725 2040