【求助】请各位dx帮忙找几篇IEEE论文，谢谢！

semileon

[1] Bandwidth of Crossbar and Multiple-Bus Connections for Multiprocessors
     Lang, T.   Valero, M.   Alegre, I.   
     Department of Computer Science, University of California;

     This paper appears in: Computers, IEEE Transactions on
     Publication Date: Dec. 1982
     Volume: C-31,  Issue: 12
     On page(s): 1227-1234

[2] Directory-based cache coherence in large-scale multiprocessors
     Chaiken, D.   Fields, C.   Kurihara, K.   Agarwal, A.   
     Comput. Sci. Lab., MIT, Cambridge, MA;

     This paper appears in: Computer
     Publication Date: Jun 1990
     Volume: 23,  Issue: 6
     On page(s): 49-58

[3] Approximate analysis of single and multiple ring networks
     Bhuyan, L.N.   Ghosal, D.   Yang, Q.   
     Center for Adv. Comput. Studies, Univ. of Southwestern Louisiana, Lafayette, LA;

     This paper appears in: Computers, IEEE Transactions on
     Publication Date: Jul 1989
     Volume: 38,  Issue: 7
     On page(s): 1027-1040

scsdyxf

要的文章在附件中，第一篇没有找到！