If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email email@example.com
Authors: Xiao, Y.; Cheng, D.; Tang, S.
Document Type: Research Article
Affiliations: Institute of Systems Science, Academy of Mathematics & System Sciences, Academia Sinica, 100080, Beijing, People's Republic of China
Publication date: December 1, 2002