4Greenberg W, van. der Mee C V M, Walus W. Strong solutions of stationary equations in abstract kinetic theory[J]. Integral Equations and Operator Theory, 1988, 11: 186-204.
5Milen E A. Radiative equilibrium in the outer layers of a star: the temperature distribution and the law of darkening[J]. Monthly Not Roy Astron Soc, 1921, 81: 361-375.
6Case K M. Elemertary solutions of the transport equation[J]. Ann Phys(N. Y), 1960, 9: 1-23.
7Busbridge I W. The Radiative Transfer[M]. London: Cambridge University Press, 1960.
8Chandrasekha S. Radiative Transfer[M]. London: Oxford University Press, 1956.
9Beals R. An abstract treatment of some forward-backward problems of transport and scattering[J].Journal of Functional Analysis, 1979, 34: 1-20.
10Greenberg W, van der Mee C V M, Protopoescu V. Boundary Value Problems in Abstract Kinetic Theory[M]. Boston: Basel and Boston Birkhaüser OT, 1987, 23.