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The Graphical Traveling Salesperson Problem has no integer programming formulation in the original space
Walter, Matthias - In: Operations research letters 49 (2021) 4, pp. 623-624
Persistent link: https://www.econbiz.de/10012649050
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Recognizing series-parallel matrices in linear time
Walter, Matthias - In: INFORMS journal on computing : JOC ; charting new … 35 (2023) 6, pp. 1404-1418
Persistent link: https://www.econbiz.de/10014471525
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Minimizing average project team size given multi-skilled workers with heterogeneous skill levels
Walter, Matthias; Zimmermann, Jürgen - In: Computers & operations research : and their … 70 (2016), pp. 163-179
Persistent link: https://www.econbiz.de/10011450271
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Extended formulations for radial cones
Walter, Matthias; Weltge, Stefan - In: Operations research letters 47 (2019) 5, pp. 458-463
Persistent link: https://www.econbiz.de/10012110614
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R&D efficiency and barriers to entry : a two stage semi-parametric DEA approach
Cullmann, Astrid; Schmidt-Ehmcke, Jens; Zloczysti, Petra - 2010
Persistent link: https://www.econbiz.de/10008746937
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Regulation and investment incentives in electricity distribution : an empirical assessment
Cullmann, Astrid; Nieswand, Maria - In: Energy economics 57 (2016), pp. 192-203
Persistent link: https://www.econbiz.de/10011698320
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Finding the right yardstick : regulation of electricity networks under heterogeneous environments
Bjørndal, Endre; Bjørndal, Mette; Cullmann, Astrid; … - In: European journal of operational research : EJOR 265 (2018) 2, pp. 710-722
Persistent link: https://www.econbiz.de/10011811486