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Margaris D, Spiliotopoulos D, Karagiorgos G, Vassilakis C.  2020.  An Algorithm for Density Enrichment of Sparse Collaborative Filtering Datasets Using Robust Predictions as Derived Ratings. Algorithms. 13:174.
Margaris D, Vassilakis C.  2020.  Improving collaborative filtering’s rating prediction coverage in sparse datasets by exploiting the “friend of a friend” concept. International Journal of Big Data Intelligence. 7(1)
Margaris D, Vassilakis C, Spiliotopoulos D.  2022.  On Producing Accurate Rating Predictions in Sparse Collaborative Filtering Datasets. Information. 13:302.
Margaris D, Vassilakis C, Spiliotopoulos D.  2020.  What makes a review a reliable rating in recommender systems? Information Processing & Management. 57(6):102304.
Margaris D, Vassilakis C.  2018.  Exploiting Rating Abstention Intervals for Addressing Concept Drift in Social Network Recommender Systems. Informatics. 5:21pages.
Margaris D, Spiliotopoulos D, Vassilakis C.  2021.  Identifying Reliable Recommenders in Users' Collaborating Filtering and Social Neighbourhoods. Lecture Notes in Social Networks. :51–76.
Margaris D, Kobusinska A, Spiliotopoulos D, Vassilakis C.  2020.  An Adaptive Social Network-Aware Collaborative Filtering Algorithm for Improved Rating Prediction Accuracy. IEEE Access. 8:68301–68310.
Margaris D, Vassilakis C.  2017.  Using Time Clusters for Following Users’ Shifts in Rating Practices. Complex Systems Informatics and Modeling Quarterly. 13
Margaris D, Spiliotopoulos D, Vasilopoulos D, Vassilakis C.  2021.  A User Interface for Personalising WS-BPEL Scenarios. Proceedings of the 2021 International Conference on Human-Computer Interaction: HCI in Business, Government and Organizations.
Margaris D, Vassilakis C, Spiliotopoulos D, Ougiaroglou S.  2023.  Rating Prediction Quality Enhancement in Low-Density Collaborative Filtering Datasets. Big Data and Cognitive Computing. 7:59.
Margaris D, Spiliotopoulos D, Karagiorgos G, Vassilakis C, Vasilopoulos D.  2021.  On Addressing the Low Rating Prediction Coverage in Sparse Datasets Using Virtual Ratings. SN Computer Science. 2:255.
Margaris D, Vassilakis C, Spiliotopoulos D.  2019.  Handling uncertainty in social media textual information for improving venue recommendation formulation quality in social networks. Social Network Analysis and Mining. 9:64.
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Sgardelis K, Margaris D, Spiliotopoulos D, Vassilakis C.  2023.  A User Interface for Tuning QoS parameters in Recommendation-Based Business Process Scenario Adaptation. Proceedings of the 19th International Conference on Web Information Systems and Technologies (WEBIST 2023).