Browsing PhD in Economics, Administration and Computer Science by Subject "%CE%B5%CF%85%CF%81%CF%89%CF%80%CE%B1%CF%8A%CE%BA%CE%AE %CE%B4%CE%B9%CE%AC%CF%83%CF%84%CE%B1%CF%83%CE%B7 %CF%83%CF%84%CE%B7%CE%BD %CE%B5%CE%BA%CF%80%CE%B1%CE%AF%CE%B4%CE%B5%CF%85%CF%83%CE%B7"