2-best solutions under distance constraints: the model and exemplary results for matroids
Ingo Althöfer
and Walter Wenzel
Advances in Applied Mathematics 22(2):155–185, Feb 1999
Tech. report Math/Inf/97/17, Friedrich-Schiller-Univ. Jena, Fakultät für Mathematik und Informatik, 20 Jun 1997
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