Gorana Jelic Mrcelic and  Merica Sliskovic,  Sustainable Ship Management.   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2013, vol. 79(7). 1939 - 1942
    [viewed 19 May 2021]. Available from: https://publications.waset.org/pdf/16299.