| 2021 | Towards objective multi-criteria drone evaluation based on VIKOR and COMET methods. | Volodymyr Kozlov, Tomasz Norek |
| 2021 | The Use of ICT in Higher Education from the Perspective of the University Students. | Diana Kozlova, Marcel Pikhart |
| 2021 | Barriers to innovative activity in the sustainable development of public sector organizations. | Katarzyna Koziol-Nadolna, Karolina Beyer |
| 2021 | Determinants of the decision-making process in organizations. | Katarzyna Koziol-Nadolna, Karolina Beyer |
| 2021 | Heterogeneous ensembles of classifiers in predicting Bundesliga football results. | Jan Kozak, Szymon Glowania |
| 2021 | Modeling e-loyalty of Polish young consumers: comparing the impact of selected online communication tools in 2016 and 2021. | Magdalena Kowalska |
| 2021 | Social Media e-Leadership Practices During the COVID-19 Pandemic in Higher Education. | Nina Kotula, Dominika Kaczmarek-Ciesielska, Grzegorz Mazurek |
| 2021 | Effectiveness of city halls' social networking sites in Poland based on the Data Envelopment Analysis (DEA) Methodology. | Magdalena Kotnisa, Malgorzata K. Guzowska |
| 2021 | New financing Methods and ICT versus Logistics Startups. | Jaroslaw Korpysa, Marcin Halicki, Andreas Uphaus |
| 2021 | Process-oriented Knowledge Representation of the Requirement Management Phase of TOGAF-ADM: an Empirical Evaluation. | Elena Kornyshova, Judith Barrios |
| 2021 | Averaging and Boosting Methods in Ensemble-Based Classifiers for Text Readability. | Ruslan Korniichuk, Mariusz Boryczka |
| 2021 | Analysis of recognition of inter-organizational conflict and actions to address it using dependency expressions. | Hidekazu Kondo, Kazuhiko Tsuda, Yasunobu Kino |
| 2021 | Synthetic measures in benchmarking of the New Silk Road countries. | Krzysztof Kompa, Dorota Witkowska |
| 2021 | Learning through Esports in Innovation Practice on Electrical Technology. | Minoru Komatsu, Takashi Matsumoto, Christopher Prowant |
| 2021 | Particle Swarm Optimization and L'evy Flight integration. | Joanna Kolodziejczyk, Yuliia Tarasenko |
| 2021 | Statistical Tests Independence Verification Methods. | Roman V. Kochan, Lyudmila Kovalchuk, Oleksandr Korchenko, Nataliia Kuchynska |
| 2021 | Basic research on a handwritten note image recognition system that combines two OCRs. | Yasuhiro Kobayashi, Shunya Mimuro, Shin-nosuke Suzuki, Yousuke Iijima, Akira Okada |
| 2021 | An Insight into Online Foreign Language Learning and Teaching in the Era of COVID-19 Pandemic. | Blanka Klmov |
| 2021 | Use of Virtual Reality in Non-Native Language Learning and Teaching. | Blanka Klmov |
| 2021 | Support for the decision-making process in designing and implementing a new product on the market. Case study using focus group interview. | Jordan Klimek, Julia Anna Klimek |
| 2021 | Extended Zernike invariants backed with complex-valued integral images for detection tasks. | Przemyslaw Klesk, Aneta Bera, Dariusz Sychel |
| 2021 | Logarithmic Least Squares criterion revisited for general matrices of pairwise comparisons. | Przemyslaw Klesk |
| 2021 | Cultural and creative industries as boost for innovation and sustainable development of companies in cross innovation process. | Monika Klein, Laima Gerlitz, Monika Spychalska-Wojtkiewicz |
| 2021 | Comparison of Fuzzy TOPSIS, Fuzzy VIKOR, Fuzzy WASPAS and Fuzzy MMOORA methods in the housing selection problem. | Bartlomiej Kizielewicz, Aleksandra Baczkiewicz |
| 2021 | Modeling Employee Flexible Work Scheduling As A Classification Problem. | Fred N. Kiwanuka, Louay Karadsheh, Ja'far Alqatawna, Anang Hudaya Muhamad Amin |