| 2019 | IFSA | Hybrid Connection Between Fuzzy Rough Sets and Ordered Fuzzy Numbers. | Piotr Prokopowicz, Marcin S. Szczuka |
| 2017 | EUSFLAT | Modeling Trends in the Hierarchical Fuzzy System for Multi-criteria Evaluation of Medical Data. | Piotr Prokopowicz, Dariusz Mikolajewski, Emilia Mikolajewska, Krzysztof Tyburek |
| 2017 | ICAISC | Fuzzy System as an Assessment Tool for Analysis of the Health-Related Quality of Life for the People After Stroke. | Piotr Prokopowicz, Dariusz Mikolajewski, Emilia Mikolajewska, Piotr Kotlarz |
| 2016 | FedCSIS | Analysis of the Changes in Processes Using the Kosinski's Fuzzy Numbers. | Piotr Prokopowicz |
| 2015 | ICAISC | The Directed Compatibility Between Ordered Fuzzy Numbers - A Base Tool for a Direction Sensitive Fuzzy Information Processing. | Piotr Prokopowicz, Witold Pedrycz |
| 2015 | ICAISC | Comparison of the Efficiency of Time and Frequency Descriptors Based on Different Classification Conceptions. | Krzysztof Tyburek, Piotr Prokopowicz, Piotr Kotlarz, Michal Repka |
| 2014 | ICAISC | Aggregation Operator for Ordered Fuzzy Numbers Concerning the Direction. | Piotr Prokopowicz, Samira Malek Mohamadi Golsefid |
| 2014 | ICAISC | The Linguistic Modeling of Fuzzy System as Multicriteria Evaluator for the Multicast Routing Algorithms. | Piotr Prokopowicz, Maciej Piechowiak, Piotr Kotlarz |
| 2014 | ICAISC | Fuzzy System for the Classification of Sounds of Birds Based on the Audio Descriptors. | Krzysztof Tyburek, Piotr Prokopowicz, Piotr Kotlarz |
| 2014 | IJCCI | Computational Intelligence in a Classification of Audio Recordings of Nature. | Krzysztof Tyburek, Piotr Prokopowicz, Piotr Kotlarz |
| 2013 | ICAISC | Flexible and Simple Methods of Calculations on Fuzzy Numbers with the Ordered Fuzzy Numbers Model. | Piotr Prokopowicz |
| 2012 | ICAISC | Implications on Ordered Fuzzy Numbers and Fuzzy Sets of Type Two. | Magdalena Kacprzak, Witold Kosinski, Piotr Prokopowicz |
| 2008 | ICAISC | Adaptation of Rules in the Fuzzy Control System Using the Arithmetic of Ordered Fuzzy Numbers. | Piotr Prokopowicz |
| 2007 | EUSFLAT | Fuzziness - Representation of Dynamic Changes?. | Witold Kosinski, Piotr Prokopowicz |
| 2004 | ICAISC | Fuzzy Calculator - Useful Tool for Programming with Fuzzy Algebra. | Roman Kolesnik, Piotr Prokopowicz, Witold Kosinski |