Employing Natural Language Processing Techniques for Online Job Vacancies Classification. - George Varelas; Dimitris Lagios; Spyros Ntouroukis; Panagiotis Zervas; Kenia Parsons; Giannis Tzimas (AIAI (Workshops), 2022)

Exploring the role of country social and medical characteristics in patient level mortality in COVID-19 pandemic using Unsupervised Learning. - George Varelas; Evangelos Sakkopoulos; Giannis Tzimas (Intell. Decis. Technol., 2022)

Forecasting Electricity Demand in Greece: A Functional Data Approach in High Dimensional Hourly Time Series. - George Varelas; Giannis Tzimas; Panayiotis Alefragis (SN Comput. Sci., 2024)

Interval Time Series Forecasting: An Innovative Approach Transforming Interval to Single Time Series. - George Varelas; Giannis Tzimas (Expert Syst. J. Knowl. Eng., 2025)