Gouhier, Mathieu, and Raphaël Paris. “SO2 and Tephra Emissions During the December 22, 2018 Anak Krakatau Eruption”. Volcanica 2, no. 2 (July 9, 2019): 91–103. Accessed February 4, 2025. https://jvolcanica.org/ojs/index.php/volcanica/article/view/37.