Integrated Fuzzy Multi Criteria Decision Making Approach for Sustainable Energy Technology Selection. - Gülçin Büyüközkan; Celal Alpay Havle; Orhan Feyzioglu; Deniz Uztürk (IEEA, 2020)

A combined group decision making based IFCM and SERVQUAL approach for strategic analysis of airline service quality. - Gülçin Büyüközkan; Celal Alpay Havle; Orhan Feyzioglu; Fethullah Göçer (J. Intell. Fuzzy Syst., 2020)

Intuitionistic Fuzzy Cognitive Map Based Analysis of Supply Chain Risks. - Gülçin Büyüközkan; Celal Alpay Havle; Orhan Feyzioglu (APMS (5), 2021)

Modernizing Data and Cloud Practices: A Review and Model Proposal for Future Studies. - Celal Alpay Havle; Sena Kilic; Caglar Ucler (ICE/ITMC, 2023)