Browsing PhD in Economics, Administration and Computer Science by Subject "%CE%B5%CE%BE%CF%89%CF%84%CE%B5%CF%81%CE%B9%CE%BA%CE%AE %CF%80%CE%BF%CE%BB%CE%B9%CF%84%CE%B9%CE%BA%CE%AE %CE%BA%CE%B1%CE%B9 %CE%B4%CE%B9%CF%80%CE%BB%CF%89%CE%BC%CE%B1%CF%84%CE%AF%CE%B1"