dx.doi.org/10.1016/s0022-4073(03)00184-5
J. Quant. Spectrosc. Radiat. Transfer

Maurellis, A. N, Lang, R, & Landgraf, J. (2004). The opacity coefficient method - nongrey determination of inhomogeneous atmospheric extinction. J. Quant. Spectrosc. Radiat. Transfer, 84, 295–323. doi:10.1016/s0022-4073(03)00184-5