%% -*-BibTeX-*- @InProceedings{AscheuerEscuderoGroetschelEtal1990, author = "Norbert Ascheuer and Laureano F. Escudero and Martin Gr{\"o}tschel and Mechthild Stoer", editor = "Ravi Kannan and William R. Pulleyblank", booktitle = "Integer Programming and Combinatorial Optimization, Proceeedings of a Conference held at the University of Waterloo, May 28-30, 1990", title = "On Identifying in Polynomial Time Violated Subtour Elimination and Precedence Forcing Constraints for the Sequential Ordering Problem", publisher = "University of Waterloo Press", pages = "19--28", year = "1990", language = "English", }