00314nas a2200109   4500000000100000008004100001100002400042700002200066700001900088700001600107245008100123       2011                            d1 aTadeusz Czachórski1 aKrzysztof Grochla1 aAdam Józefiok1 aTomasz Nycz00aSimulation, Markov Chain and Diffusion Approximation Models – a Case Study