Depolarization of multiple scattered light in atmospheres due to   anisotropy of small grains and molecules. II. The problems with sources
  In the previous paper we considered two classic problems - the diffuse reflection of the light beam from semi-infinite atmosphere, and the Milne problem. For both problems we used the technique of invariance principle. In this paper we consider the solution of the problem when in semi-infinite atmosphere the sources of unpolarized radiation are exist. Here we used the technique of the Green matrices. We consider only continuum radiation. 
N. A. Silant'ev, G. A. Alekseeva, V. V. Novikov (Central Astronomical   Observatory at Pulkovo of Russian Academy of Science...
astro-ph.SR