Astle, H., y L. H. van Opstal. «ECMAN A Standard Database Management System for Electronic Chart Display and Information Systems (ECDIS)». The International Hydrographic Review 67, no. 2 (mayo 15, 2015). Accedido mayo 19, 2024. https://journals.lib.unb.ca/index.php/ihr/article/view/23305.