Impact of vehicles at the roadside of expressway in urban area: Simultaneous measurement of particle size distribution and positive matrix factorization - San Kim; Nam Geon Kim; Jimin Kim; Hwandong Kim; Kyung Hwan Kim; Wonsik Choi; Kyung-Hwan Kwak; Changhyuk Kim; Sang-Hee Woo; Seokhwan Lee; Woo Young Kim; Kang-Ho Ahn; et al. (Science of The Total Environment, 2024)