
https://www.ipg-journal.de/regionen/europa/artikel/detail/wind-in-ihren-segeln-4625/

https://www.publications.parliament.uk/pa/cm201617/cmselect/cmexeu/1125/1125.pdf

http://www2.warwick.ac.uk/fac/soc/pais/research/researchcentres/irs/crossingthemed/ctm_final_report_4may2017.pdf