2024-11-142024-11-141993-07-151993-07-151993-07-151993-07-15https://gordailua.ueu.eus/handle/123456789/101application/pdfCopyright (c) 1993 Uztarohttps://creativecommons.org/licenses/by-nc-sa/4.0info:eu-repo/semantics/article