Keyvan Shahgholian and  Hamid Hajihosseini,  A Dynamic Model of Air Pollution, Health,and Population Growth Using System Dynamics: A Study on Tehran-Iran (With Computer Simulation by the Software Vensim).   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 372 - 379
    [viewed 21 October 2019]. Available from: https://publications.waset.org/pdf/15736.