Shahzad, M. I., J. E. Nichol,
J. Wang, J. R. Campbell, and P. W. Chan (2013), Estimating surface visibility at Hong Kong from ground-based LIDAR, sun photometer and operational MODIS products,
Journal of the Air & Waste Management Association, 63, 1098-1110, doi:10.1080/10962247.2013.801372.