世界版权公约
https://baike.baidu.com/item/%E4%B8%96%E7%95%8C%E7%89%88%E6%9D%83%E5%85%AC%E7%BA%A6/1848400?fr=aladdin《世界版权公约》对作品保护期的规定包括:
原则上,受公约保护的作品保护期不应少于作者有生之年及其死后的25年。
Universal Copyright Convention
http://www.tauvisual.com/copyrightlaws/convenzione_internazionale_copyright_ginevra1952.pdfArticle IV
2. The term of protection for works protected under this Convention shall not beless than the life of the author and twenty-five years_ after his death.