ZGAGA, Pavel, 2007, The Bologna process and the reform of doctoral education in Europe. [na spletu]. 2007. Vol. 6, no. 2, p. 7–8. [Dostopano 19 marec 2025]. Pridobljeno s: http://portal.acs.org/portal/PublicWebSite/education/students/graduate/newsletter/CNBP_025361