1. https://www.msfd.eu/.
2. https://www.msfd.eu/knowseas/about.html
3. https://mcc.jrc.ec.europa.eu/main/dev.py?N=28&O=223&titre_chap=D10
4. Guidance on Monitoring of Marine Litter in European Seas, JRC SCIENTIFIC AND POLICYREPORTS, MSFD Technical Subgroup on Marine Litter, 2013, ISBN 978-92-79-32709-4 (pdf)
5. https://marine.copernicus.eu/