1. On the solution of the Boltzmann equation for rarefied gases
2. H. S. Carslaw and J. C. Jaeger,Conduction of Heat in Solids(Oxford University Press, New York, 1959), 2nd ed., p. 256.
3. The heat flow problems analogous to the configurations (a), (b), and (c) may be found in reference 3, p. 54, Eq. (3), p. 257, Eq. (6), and p. 260, Eq. (12).
4. See reference 3, p. 55, Fig. 4.