1. V. Barbu,Continuous perturbations of non-linear m-accretive operators in Banach spaces, Boll. U.M.I.,6 (1972), pp. 270–278.
2. R. Bodmer,Zur Boltzmanngleichung, Zürich, Seminar für Theor. Phys. E.T.H.
3. H. Brézis,Opérateurs maximaux monotones et semi-groupes de contraction dans les espaces de Hilbert, Math. Studies 5, North-Holland (1973).
4. F. E. Browder,Nonlinear accretive operators in Banach spaces, Bull. Am. Soc.,73 (1967), pp. 470–476.
5. C. Cercignani,Mathematical methods in kinetic theory, N. Y., Plenum Press (1969).