%% -*-BibTeX-*- @Article{GuNemhauserSavelsbergh1999, author = "Z. Gu and G. L. Nemhauser and M. W. P. Savelsbergh", title = "Lifted flow cover inequalities for mixed 0-1 integer programs", journal = "Mathematical Programming", volume = "85", pages = "439--468", year = "1999", language = "English", }