“…While this computational approach to the diffusion approximation proved to be fruitful, such interpretation hides in part the richness and the importance of the result by T. Kurtz [25]. Moreover, stochastic reaction networks attracted a renewed interest recently, see e.g., [5,13,30,36]. New motivations come both from the application in the system biology, demonstrating the emergence of the stochastic effects at small scales, and from new theoretical investigations that allowed to extend mathematical results, previously known in the deterministic setting only, to the stochastic world [2,4,10].…”