%% -*-BibTeX-*- @Article{OrtegaWolsey2003, author = "F. Ortega and L. A. Wolsey", title = "A branch-and-cut algorithm for the single-commodity, uncapacitated, fixed-charge network flow problem", journal = "Networks", volume = "41", number = "3", pages = "143--158", year = "2003", language = "English", }