1. Cercignani C., Theory and Applications of the Boltzmann Equation, Elsevier, New York (1975).
2. Novikov V. M. and Shikhov S. B., The Theory of Parameter Action on Neutron Transfer [in Russian], Energoizdat, Moscow (1982).
3. Voigt J., “Positivity in time dependent linear transport theory,” Acta Appl. Math., 2, 311–331 (1984).
4. Maslova N. B., “Mathematical methods for studying the Boltzmann equation,” St. Petersburg Math. J., 3, No. 1, 1–43 (1992).
5. Morozov S. F., “The nonstationary integro-differential transport equation,” Izv. Vyssh. Uchebn. Zaved. Mat., No. 1, 26–31 (1969).