Scientific journal publication Characterizing direct emissions of perfluoroalkyl substances from ongoing fluoropolymer production sources: A spatial trend study of Xiaoqing River, China. Shi, Y.; Vestergren, R.; Xu, L.; Song, X.; Niu, X.; Zhang, C.; Cai, Y. Publication details Journal: Environmental Pollution, 206, 104–112, 2015 DOI: 10.1016/j.envpol.2015.06.035