![Dimitrios BELIAS | Assistant Professor | PhD in Organizational Behavior & Human Resource Management /Οrganization and Services Management in the Tourist Market ( https://orcid.org/0000-0003-3409-6875) - Web of Science ID:AAP-3046-2020-https://publons ... Dimitrios BELIAS | Assistant Professor | PhD in Organizational Behavior & Human Resource Management /Οrganization and Services Management in the Tourist Market ( https://orcid.org/0000-0003-3409-6875) - Web of Science ID:AAP-3046-2020-https://publons ...](https://i1.rgstatic.net/ii/profile.image/899530430111751-1591476175956_Q512/Dimitrios-Belias.jpg)
Dimitrios BELIAS | Assistant Professor | PhD in Organizational Behavior & Human Resource Management /Οrganization and Services Management in the Tourist Market ( https://orcid.org/0000-0003-3409-6875) - Web of Science ID:AAP-3046-2020-https://publons ...
Dimitris Belias - Licensed Aircraft Maintenance Engineer (B1) - Hellenic Civil Aviation Authority Flight Inspection Unit | LinkedIn
![Department of Business Administration, University of Thessaly, Greece. Gkolia, A., Tsigilis, N., Evangelou, M. & Koustelios, A. (2021). Factorial Validity and Measurement Invariance of the Principal Leadership Questionnaire in Greek Educational Context. Department of Business Administration, University of Thessaly, Greece. Gkolia, A., Tsigilis, N., Evangelou, M. & Koustelios, A. (2021). Factorial Validity and Measurement Invariance of the Principal Leadership Questionnaire in Greek Educational Context.](https://de.uth.gr/images/thumbs/default-image_900.png)
Department of Business Administration, University of Thessaly, Greece. Gkolia, A., Tsigilis, N., Evangelou, M. & Koustelios, A. (2021). Factorial Validity and Measurement Invariance of the Principal Leadership Questionnaire in Greek Educational Context.
![Ioannis MANTZARIS | Technological Educational Institute of Central Macedonia at Serres, Sérres | TEISER | Technological Educational Institute of Central Macedonia at Serres Ioannis MANTZARIS | Technological Educational Institute of Central Macedonia at Serres, Sérres | TEISER | Technological Educational Institute of Central Macedonia at Serres](https://i1.rgstatic.net/ii/profile.image/279604519555099-1443674320860_Q512/Ioannis-Mantzaris.jpg)