Erviti Ilundáin, María Carmen, et al. “Is Twitter in a Climate Emergency? The Dissemination of the Terms "climate Crisis" and ‘climate emergency,’ and Greta Thunberg’s Influence on Public Discourse”. Observatorio (OBS*), vol. 17, no. 3, Sept. 2023, https://obs.obercom.pt/index.php/obs/article/view/2130.