G. Rajamohan and  N. Ramesh and  P. Kumar,  Study on Mixed Convection Heat Transfer in Vertical Ducts with Radiation Effects.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2011, vol. 57(9). 1838 - 1842
    [viewed 09 August 2020]. Available from: https://publications.waset.org/pdf/6360.