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, let. 66, št. 4, julij 2022, str. 40-49, https://journals.um.si/index.php/oe/article/view/2118.