sub.bib

@article{FischettiLodi2003,
 author = {Fischetti, Matteo and Lodi, Andrea},
 issn = {0025-5610},
 issue = {1},
 journal = {Mathematical Programming},
 keyword = {Mathematics and Statistics},
 pages = {23-47},
 publisher = {Springer},
 title = {Local branching},
 volume = {98},
 year = {2003}
}

@article{GoossensHoeselKroon2004,
 author = {J.-W. Goossens and S. van Hoesel and L. G. Kroon},
 journal = {Transportation Science},
 language = {English},
 number = {3},
 pages = {379--393},
 title = {A Branch-and-Cut Approach for Solving Railway Line-Planning Problems},
 volume = {38},
 year = {2004}
}