• Cabotage and sulphur regulation change : cost effects to Northern EuropeHilmola, Olli-Pekka Kristian; Kiisler, Ain; Hilletofth, PerInternational journal of business and systems research2017 / p. 417-428 https://doi.org/10.1504/IJBSR.2017.087099 https://www.scopus.com/sourceid/21100314708 https://www.scopus.com/record/display.uri?eid=2-s2.0-85031280321&origin=inward&txGid=020db0c075c82678bfb012c8c63b1ee8