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@Article{Hambrusch:1997:EWR, author = "Susanne E. Hambrusch and Hung-Yi Tu", title = "Edge Weight Reduction Problems in Directed Acyclic Graphs", journal = j-J-ALG, volume = "24", number = "1", pages = "66--93", month = jul, year = "1997", CODEN = "JOALDV", DOI = "https://doi.org/10.1006/jagm.1997.0856", ISSN = "0196-6774 (print), 1090-2678 (electronic)", ISSN-L = "0196-6774", bibdate = "Tue Dec 11 09:16:42 MST 2012", bibsource = "http://www.math.utah.edu/pub/tex/bib/jalg.bib", URL = "http://www.sciencedirect.com/science/article/pii/S0196677497908567", acknowledgement = ack-nhfb, fjournal = "Journal of Algorithms", journal-URL = "http://www.sciencedirect.com/science/journal/01966774", }