PTAS for Minimax Approval Voting. - Jaroslaw Byrka; Krzysztof Sornat (WINE, 2014)

Inequity Aversion Pricing over Social Networks: Approximation Algorithms and Hardness Results. - Georgios Amanatidis; Evangelos Markakis; Krzysztof Sornat (MFCS, 2016)

Proportional Approval Voting, Harmonic k-median, and Negative Association. - Jaroslaw Byrka; Piotr Skowron 001; Krzysztof Sornat (ICALP, 2018)

Constant-factor approximation for ordered k-median. - Jaroslaw Byrka; Krzysztof Sornat; Joachim Spoerhase (STOC, 2018)

Approximation and Parameterized Complexity of Minimax Approval Voting. - Marek Cygan; Lukasz Kowalik; Arkadiusz Socala; Krzysztof Sornat (J. Artif. Intell. Res., 2018)

Participatory Budgeting with Project Interactions. - Pallavi Jain 001; Krzysztof Sornat; Nimrod Talmon (IJCAI, 2020)

Tight Approximation for Proportional Approval Voting. - Szymon Dudycz; Pasin Manurangsi; Jan Marcinkowski; Krzysztof Sornat (IJCAI, 2020)

Participatory Budgeting with Project Groups. - Pallavi Jain 001; Krzysztof Sornat; Nimrod Talmon; Meirav Zehavi (IJCAI, 2021)

Fine-Grained Complexity and Algorithms for the Schulze Voting Method. - Krzysztof Sornat; Virginia Vassilevska Williams; Yinzhan Xu (EC, 2021)

Approximation and hardness of Shift-Bribery. - Piotr Faliszewski; Pasin Manurangsi; Krzysztof Sornat (Artif. Intell., 2021)

On the Cycle Augmentation Problem: Hardness and Approximation Algorithms. - Waldo Gálvez; Fabrizio Grandoni 001; Afrouz Jabal Ameli; Krzysztof Sornat (Theory Comput. Syst., 2021)

Inequity aversion pricing over social networks: Approximation algorithms and hardness results. - Georgios Amanatidis; Peter Fulla; Evangelos Markakis; Krzysztof Sornat (Theor. Comput. Sci., 2021)

Preserving Consistency for Liquid Knapsack Voting. - Pallavi Jain 001; Krzysztof Sornat; Nimrod Talmon (EUMAS, 2022)

Near-Tight Algorithms for the Chamberlin-Courant and Thiele Voting Rules. - Krzysztof Sornat; Virginia Vassilevska Williams; Yinzhan Xu (IJCAI, 2022)

How to Sample Approval Elections? - Stanislaw Szufa; Piotr Faliszewski; Lukasz Janeczko; Martin Lackner; Arkadii Slinko; Krzysztof Sornat; Nimrod Talmon (IJCAI, 2022)

Diversity, Agreement, and Polarization in Elections. - Piotr Faliszewski; Andrzej Kaczmarczyk 001; Krzysztof Sornat; Stanislaw Szufa; Tomasz Was (IJCAI, 2023)

An Experimental Comparison of Multiwinner Voting Rules on Approval Elections. - Piotr Faliszewski; Martin Lackner; Krzysztof Sornat; Stanislaw Szufa (IJCAI, 2023)

Fine-Grained Liquid Democracy for Cumulative Ballots. - Matthias Köppe; Martin Koutecký; Krzysztof Sornat; Nimrod Talmon (AAMAS, 2024)

An O(loglog n)-Approximation for Submodular Facility Location. - Fateme Abbasi; Marek Adamczyk; Miguel Bosch-Calvo; Jaroslaw Byrka; Fabrizio Grandoni 001; Krzysztof Sornat; Antoine Tinguely (ICALP, 2024)

Aggregation of Continuous Preferences in One Dimension. - Alberto Del Pia; Dusan Knop; Alexandra Lassota; Krzysztof Sornat; Nimrod Talmon (IJCAI, 2024)

The Complexity of Subelection Isomorphism Problems. - Piotr Faliszewski; Krzysztof Sornat; Stanislaw Szufa (J. Artif. Intell. Res., 2024)

Participatory Budgeting Project Strength via Candidate Control. - Piotr Faliszewski; Lukasz Janeczko; Dusan Knop; Jan Pokorný; Simon Schierreich; Mateusz Sluszniak; Krzysztof Sornat (AAMAS, 2025)

Robust Committee Voting, or The Other Side of Representation. - Gregory Kehne; Ulrike Schmidt-Kraepelin; Krzysztof Sornat (EC, 2025)

How similar are two elections? - Piotr Faliszewski; Piotr Skowron 001; Arkadii Slinko; Krzysztof Sornat; Stanislaw Szufa; Nimrod Talmon (J. Comput. Syst. Sci., 2025)