Greek sovereign crisis and European exchange rates: effects of news releases and their providers. - Konstantinos Gkillas; Dimitrios Vortelinos; Christos Floros; Alexandros Garefalakis; Nikolaos Sariannidis (Ann. Oper. Res., 2020)

Predictability analysis of the Pound's Brexit exchange rates based on Google Trends data. - Amaryllis Mavragani; Konstantinos Gkillas; Konstantinos P. Tsagarakis (J. Big Data, 2020)

Transaction activity and bitcoin realized volatility. - Konstantinos Gkillas; Maria Tantoula; Manolis Tzagarakis (Oper. Res. Lett., 2021)

Risk aversion and the predictability of crude oil market volatility: A forecasting experiment with random forests. - Riza Demirer; Konstantinos Gkillas; Rangan Gupta; Christian Pierdzioch (J. Oper. Res. Soc., 2022)

Corporate R&D intensity and high cash holdings: post-crisis analysis. - Efstathios Magerakis; Konstantinos Gkillas; Christos Floros; George Peppas (Oper. Res., 2022)

Time-varying firm cash holding and economic policy uncertainty nexus: a quantile regression approach. - Christos Floros; Emilios Galariotis; Konstantinos Gkillas; Efstathios Magerakis; Constantin Zopounidis (Ann. Oper. Res., 2024)