1. Non-existence of a steady rarefied supersonic flow in a half-space
2. The milne and kramers problems for the boltzmann equation of a hard sphere gas
3. Theory and Application of the Boltzmann Equation, Scottish Academic Press, Edinburgh, 1975.
4. Half space problems in the kinetic theory of gases, in Trends to Applications of Pure Mathematics to Mechanics, and ed., Lect Notes in Physics 249, pp. 35–51, Springer Verlag, 1987.
5. Radiative Transfer, Dover Publications, N.Y., 1960.