Nikolaos Halidias Author

Prof. Dr. Nikolaos Halidias, University of the Aegean, Department of Statistics and Actuarial – Financial Mathematics, 83200, Greece, E-mail: [email protected]

Dr. Ioannis Stamatiou, University of West Attica, Department of Surveying and Geoinformatics Engineering, 12243, Greece, E-mail: [email protected]