Raphael Zanella and  Todd A. Oliver and  Karl W. Schulz,  An Axisymmetric Finite Element Method for Compressible Swirling Flow.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2022, vol. 191(11). 113 - 119
    [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/10012805.