1. ECORYS (2013) Study in support of policy measures for coastal and maritime tourism at EU level 21
2. European Commission, COM (2012) 473
3. European Commission, SWD (2014) 149 final
4. European Science Foundation (2010) Marine biotechnology: a new vision and strategy for Europe, Position Paper 15: 9
5. Milton J (1674), Paradise Lost, Book 2, lines 891–894. Graf Vitzthum, Handbuch des Seerechts, 2006, Chapt. 2, n. 1, who coined this term