Vušković, Petar. „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“. Naše gospodarstvo/Our economy 66, no. 4 (julij 14, 2022): 40–49. Pridobljeno november 24, 2025. https://old.journals.um.si/index.php/oe/article/view/2118.