M. Blasikiewicz et Tc. Brown, POISSON APPROXIMATIONS FOR MARKOV-DRIVEN POINT-PROCESSES, Stochastic processes and their applications, 62(1), 1996, pp. 179-189
An asymptotically finite bound is derived for the total variation dist
ance between the distribution of N(t) and the Poisson distribution wit
h mean EN(t) when N is a simple point process whose interpoint times a
re exponential with means determined by an ergodic, finite-state Marko
v chain and when it is a Cox process with a stationary, irreducible, f
inite-state continuous-time Markov chain for intensity.