00327nas a2200121   4500000000100000000000100001008004100002100002400043700002200067700001900089700001600108245008100124       2011                            d1 aTadeusz Czachórski1 aKrzysztof Grochla1 aAdam Józefiok1 aTomasz Nycz00aSimulation, Markov Chain and Diffusion Approximation Models – a Case Study