Han, Y. M., Chen, L.-W.A., Huang, R. J., Chow, J. C., Watson, J. G., Ni, H. Y., Liu, S. X., Fung, K., Shen, Z. X., Wei, C., Wang, Q. Y., Tian, J., Zhao, Z. Z., Prevot, A. H., Cao, J. (2016). Carbonaceous aerosol in megacity Xi’an, China: Implications of thermal/optical protocol comparison, Atmos. Environ., 132 (May 2016), 58-68, 10.1016/j.atmosenv.2016.02.023