2025

• Grimm V., Grübel J., Schmidt M., Schwartz A., Wiertz AK., Zöttl G.:
  On a tractable single-level reformulation of a multilevel model of the European entry-exit gas market with market power
  In: Journal of Global Optimization 91 (2025), S. 953-985
  ISSN: 0925-5001
  DOI: 10.1007/s10898-025-01475-8
• Grimm V., Grübel J., Schmidt M., Schwartz A., Wiertz AK., Zöttl G.:
  Publisher Correction: On a tractable single-level reformulation of a multilevel model of the European entry-exit gas market with market power (Journal of Global Optimization, (2025), 91, 4, (953-985), 10.1007/s10898-025-01475-8)
  In: Journal of Global Optimization (2025)
  ISSN: 0925-5001
  DOI: 10.1007/s10898-025-01498-1

2024

• Oggioni G., Schwartz A., Wiertz AK., Zöttl G.:
  Dynamic pricing and strategic retailers in the energy sector: A multi-leader-follower approach
  In: European Journal of Operational Research 312 (2024), S. 255-272
  ISSN: 0377-2217

2023

• Bärmann A., Gemander P., Merkert M., Wiertz AK., Zaragoza Martínez FJ.:
  Algorithms for the clique problem with multiple-choice constraints under a series–parallel dependency graph
  In: Discrete Applied Mathematics 324 (2023), S. 145-166
  ISSN: 0166-218X
  DOI: 10.1016/j.dam.2022.09.015
• Grimm V., Grübel J., Schmidt M., Schwartz A., Zöttl G., Wiertz AK.:
  On a Tractable Single-Level Reformulation of a Multilevel Model of the European Entry-Exit Gas Market with Market Power
  (2023)
  URL: https://optimization-online.org/?p=24743
  (Working Paper)

2021

• Oggioni G., Schwartz A., Zöttl G., Wiertz AK.:
  Retailer Competition
  (2021)
  URL: https://opus4.kobv.de/opus4-trr154/frontdoor/index/index/start/10/rows/10/sortfield/score/sortorder/desc/searchtype/simple/query/zöttl/docId/455
  (Working Paper)