«Objectives». E-ferry, an EU project under the H2020 Research and Innovation programme. Arxivat de l'original el 2020-08-08. [Consulta: 21 agost 2020].
«Objectives». E-ferry, an EU project under the H2020 Research and Innovation programme. Arxivat de l'original el 2020-08-08. [Consulta: 21 agost 2020].