Kovačić, Nataša, und Hrvoje Grofelnik. „The impact of tourism on the environment in legally protected areas – a study of the connection between the carbon footprint of road traffic and tourism using the example of the Učka tunnel in the Učka nature park“. Turizam i zaštićena područja: zbornik radova sa znanstvenog kolokvija, herausgegeben von Nikola Bašić und Josip Faričić, Morepress Books, 2025, S. 163-81, https://doi.org/10.15291/9789533315447.08.