1. Radiative Transfer in a Planetary Atmosphere with Imperfect Scattering;Sekera;Rand Report R-413-PR,1963
2. Positivity and Criticality;Birkhoff,1961
3. Scattering Processes;Wang,1966
4. On the relation of scattering matrix, Riccati equation and boundary conditions;Wang;J. Math. Anal. Appl.,1967
5. Radiative Transfer;Chandrasekhar,1960