Schwabe, Julian, and Markus Hassler. “The Impact of Periodic Air Pollution Peaks in Beijing on Air Quality Governance in China”. DIE ERDE – Journal of the Geographical Society of Berlin 147, no. 1 (March 22, 2016): 53–65. Accessed July 3, 2024. https://die-erde.org/index.php/die-erde/article/view/255.