| 2025 | ADBIS | LSBlock: A Hybrid Blocking System Combining Lexical and Semantic Similarity Search for Record Linkage. | Dimitrios Karapiperis, Christos Tjortjis, Vassilios S. Verykios |
| 2021 | WEBIST | Predicting Stock Market Movements with Social Media and Machine Learning. | Paraskevas Koukaras, Vasiliki Tsichli, Christos Tjortjis |
| 2017 | EANN | The 50/50 Recommender: A Method Incorporating Personality into Movie Recommender Systems. | Orestis Nalmpantis, Christos Tjortjis |
| 2017 | KSEM | ARMICA-Improved: A New Approach for Association Rule Mining. | Shahpar Yakhchi, Seyed Mohssen Ghafari, Christos Tjortjis, Mahdi Fazeli |
| 2017 | VEHITS | Short-Term Traffic Prediction under Both Typical and Atypical Traffic Conditions using a Pattern Transition Model. | Traianos-Ioannis Theodorou, Athanasios Salamanis, Dionysios D. Kehagias, Dimitrios Tzovaras, Christos Tjortjis |
| 2013 | SMC | Personalised Fuzzy Recommendation for High Involvement Products. | Vassilis C. Gerogiannis, Anthony Karageorgos, Liwei Liu, Christos Tjortjis |
| 2010 | WETICE | Towards Agent-Based 'Smart' Collaboration in Enterprise Networks. | Anthony Karageorgos, Anthony Avramouli, Georgios Ntalos, Christos Tjortjis, Konstantina Vassilopoulou |
| 2007 | ICTAI | k-Attractors: A Clustering Algorithm for Software Measurement Data Analysis. | Yiannis Kanellopoulos, Panagiotis Antonellis, Christos Tjortjis, Christos Makris |
| 2006 | IDEAL | Towards Healthy Association Rule Mining (HARM): A Fuzzy Quantitative Approach. | Maybin K. Muyeba, M. Sulaiman Khan, Zarrar Malik, Christos Tjortjis |
| 2004 | IDEAL | PRICES: An Efficient Algorithm for Mining Association Rules. | Chuan Wang, Christos Tjortjis |
| 2003 | IDEAL | Experiences of Using a Quantitative Approach for Mining Association Rules. | Liang Dong, Christos Tjortjis |
| 2002 | COMPSAC | A Model for Selecting CSCW Technologies for Distributed Software Maintenance Teams in Virtual Organisations. | Christos Tjortjis, Georgios A. Dafoulas, Paul J. Layzell, Linda A. Macaulay |
| 2002 | COMPSAC | From System Comprehension to Program Comprehension. | Christos Tjortjis, Nicolas Gold, Paul J. Layzell, Keith H. Bennett |
| 2002 | IDEAL | T3: A Classification Algorithm for Data Mining. | Christos Tjortjis, John A. Keane |
| 2001 | APSEC | Expert Maintainers' Strategies and Needs when Understanding Software: A Case Study Approach. | Christos Tjortjis, Paul J. Layzell |