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| pages = 125–130
| doi = 10.6028/jres.069B.013
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As elaborated by [[Alexander Schrijver]], further significance of the result comes from the fact that this was the first polytope whose proof of integrality "does not simply follow just from [[total unimodularity]], and its description was a breakthrough in [[polyhedral combinatorics]]."<ref>{{Cite book|url=https://www.springer.com/us/book/9783540443896|title=Combinatorial Optimization: Polyhedra and Efficiency|last=Schrijver|first=Alexander|date=2003|publisher=Springer-Verlag|isbn=9783540443896|series=Algorithms and Combinatorics|___location=Berlin Heidelberg|language=en}}</ref>
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