%% -*-BibTeX-*- @Article{GuNemhauserSavelsbergh2000, author = "Z. Gu and G. L. Nemhauser and M. W. P. Savelsbergh", title = "Sequence independent lifting in mixed integer programming", journal = "Journal on Combinatorial Optimization", volume = "4", pages = "109--129", year = "2000", language = "English", }