Amir Taghavi and  kourosh Parand and  Hosein Fani,  Lagrangian Method for Solving Unsteady Gas Equation.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 991 - 995
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/8328.