Some articles on microreversibility:

History of Microscopic Reversibility
... This reversibility of collisions is the first example of microreversibility ... According to Boltzmann, this microreversibility implies the principle of detailed balance for collisions at the equilibrium ensemble all collisions are ... Albert Einstein (1916, 1917) gives an example of application of the microreversibility and detailed balance to development of a new branch of kinetic theory ...