Marjan Hericko Ales Zivkovic Zoltán Porkoláb A Method for Calculating Acknowledged Project Effort Using a Quality Index. 431-436 2007 31 Informatica (Slovenia) 4 http://www.informatica.si/PDF/31-4/09_Hericko-A%20Method.pdf db/journals/informaticaSI/informaticaSI31.html#HerickoZP07