World Maritime University do not allow that copyright material is stored unauthorized by third parties. Like any other journal, World Maritime University provide every author with a personal electronic copy of her/his manuscript to be used for private and educational purposes. World Maritime University have no objection if an author stores the original text of a published manuscript in a publically acessible data base, provided it has a reference to the original publication and provided it is not the electronic version or a scan of an article published in our journal.(verified by Yali via email)