WASET
    Pravesh Chandra Shukla and  Kunal Ghosh,  Revival of the Modern Wing Sails for the Propulsion of Commercial Ships.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 27(3). 207 - 212
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/245.