WASET
    Thea Freese,  Economic Effects of Maritime Environmental Legislation in the North and Baltic Sea Area: An Exploratory Sequential Mixed Methods Approach.   journal   = {International Journal of Transport and Vehicle Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2017, vol. 126(6). 757 - 760
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10007266.