Čulić-Viskota, Adelija, and Hans Rummel. “Tribute to Kurt Opitz (1931-2021) - German Contributor to Maritime English”. Transactions on Maritime Science 11, no. 2 (October 21, 2022). Accessed April 20, 2024. https://www.toms.com.hr/index.php/toms/article/view/543.