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[http://www.google.ca/search?hl=en&rlz=1T4SKPB_enCA312CA312&num=100&q=%22Discrete-Event+Modeling+and+Simulation%3A+A+Practitioner%27s+Approach%22+&meta=|Course Textbook]]
Introduction. Get the Chapter 1 from Prof. Zeigler's website. You can read the introductory materials in the book "Theory of modelling and simulation", by B. Zeigler, H. Praehofer and T. Kim