@InProceedings{l06-p410-422, AUTHOR = {Feodor~F. Dragan and Chenyu Yan}, TITLE = {Network Flow Spanners}, YEAR = 2006, BOOKTITLE = {Proc.~of the 7th Latin American Symposium on Theoretical Informatics (LATIN'06)}, ADDRESS = {Valdivia, Chile}, PAGES = {410--422}, KEYWORDS = {}}