1. Department of Logistics and Maritime Studies, The Hong Kong Polytechnic University Hung Hom, Kowloon, Hong Kong
2. School of Management, Shanghai University, Shang Da Road 99, Shanghai 200444, P. R. China
3. Department of Geography, University of Malta, Msida, Malta, Institute for Climate Change and Sustainable Development, University of Malta, Msida MSD 2080, Malta