1. Estimation of internal source distribution using external field measurements in radiation transfer;Bellman;Icarus,1966
2. A computational approach to Chandrasekhar's planetary problem;Bellman;J. Franklin Inst.,1966
3. Numerical Results for the Estimation of Source Distributions from External Radiation Field Measurements;Bellman,1966
4. Radiative Transfer;Chandrasekhar,1950
5. Radiation diffusion in an anisotropic medium adjoining a reflecting surface;Gutshabash;Izv. Akad. Sci., USSR, Geophys. Ser.,1962