P. Vušković, „Analysis of the Fluctuation of the Number of ISO 9001:2015 Certificates in the Republic of Croatia and Assessment of Satisfaction of Business Organisations Leadership with the Certificate“, OE, let. 66, št. 4, str. 40–49, jul. 2022, Pridobljeno: avg. 27, 2026. Dostopno na: https://journals.um.si/index.php/oe/article/view/2118