Lelieveld, J. Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;
Ma, J. Z., Chen, Y., Wang, W., Yan, P., Liu, H. J., Yang, S. Y., et al. (2010). Strong air pollution causes widespread haze-clouds over China. Journal of Geophysical Research-Atmospheres, 115: D18204. doi:10.1029/2009JD013065.