  In 1948, Koppe formulated an almost complete recipe for statistical-thermal
models including particle production, formation and decay of resonances,
temporal and thermal evolution of the interacting system, statistical
approaches and equilibrium condition in final state of the nuclear interaction.
As the rate of particle production was one of the basic assumptions, recalling
Koppe's work would be an essential input to be involved in the statistical
prediction of non-equilibrium particle production in recent and future
ultra-relativistic collisions.
