Unique observatories for sea science and particle astrophysics: The EMSO-Antares and EMSO-Western Ionian nodes in the Mediterranean SeaDominique Lefevre, Bruno Zakardkjian and Daniele EmbarcioEPJ Web Conf., 207 (2019) 09004DOI: https://doi.org/10.1051/epjconf/201920709004