1. R.L. Bowden, William Greenberg and P.F. Zweifel, J. Math. Phys. 20, 1099 (1979).
2. This condition, generally referred to as a “half range” boundary condition, has analogues in some areas of classical differential equation theory, ~ so called “mixed” boundary conditions. Similar methods to those described here are required for the construction of solutions to the differential equations (cf. Reference 7).
3. K.M. Case and P.F. Zweifel, “Linear Transport Theory,” Addison-Wesley, Reading, Mass (1967).
4. E. Inönü and P.F. Zweifel (Editors), “Developments in Transport Theory,” Academic Press, New York (1967).
5. M.M.R. Williams, Adv. Nucl. Sci. Eng. 7, 283 (1975).