@InProceedings{venkataramani04online, 
author = {X. Li and C.G. Plaxton and M. Tiwari and A. Venkataramani}, 
 title = {Online Hierarchical Cooperative Caching}, 
 booktitle = {Sixteenth Symposium on Parallelism in Algorithms and Architectures {SPAA}}, 
 year = 2004 , 
 preprintpdf = http://www.cs.utexas.edu/users/dahlin/papers/venkataramani-on-line-coop-feb2004.pdf, 
 category = "webos,WANrepl" 
 }