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    <title language="eng">Planungsprobleme im öffentlichen Verkehr</title>
    <parentTitle language="eng">PRODUKTIONSFAKTOR MATHEMATIK – Wie Mathematik Technik und Wirtschaft bewegt</parentTitle>
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    <publisherName>Wiley</publisherName>
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    <title language="eng">Polyhedral theory</title>
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    <editor>Eugene Lawler</editor>
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    <editor>Jan Lenstra</editor>
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    <title language="eng">Polyhedral computations</title>
    <parentTitle language="eng">The Traveling Salesman Problem. A Guided Tour of Combinatorial Optimization</parentTitle>
    <author>Manfred Padberg</author>
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    <publisherName>Verlag Chemie</publisherName>
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    <title language="eng">Fortschritte in der polyedrischen Kombinatorik</title>
    <parentTitle language="eng">Ökonomische Prognose-, Entscheidungs- und Gleichgewichtsmodelle, Abschlußberichte des SFB 21</parentTitle>
    <author>Martin Grötschel</author>
    <editor>Wilhelm Krelle</editor>
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    <publisherName>Birkhäuser</publisherName>
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    <title language="eng">Developments in combinatorial optimization</title>
    <parentTitle language="eng">Perspectives in Mathematics (Anniversary of Oberwolfach 1984)</parentTitle>
    <author>Martin Grötschel</author>
    <editor>Willi Jäger</editor>
    <editor>J. Moser</editor>
    <editor>R. Remmert</editor>
    <collection role="persons" number="groetschel">Grötschel, Martin</collection>
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    <publisherName>Berlin-Brandenburgische Akademie der Wissenschaften</publisherName>
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    <title language="eng">Der junge Albring und Schwelm</title>
    <parentTitle language="eng">Der Forscher und der Zweifler - Werner Albring zum 90. Geburtstag</parentTitle>
    <author>Martin Grötschel</author>
    <editor>Berlin-Brandenburgische der Wissenschaften</editor>
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