See ISPEĀ GuidelinesĀ 4.09.Source: http://www.epo.org/law-practice/legal-texts/html/guidelinespct/e/f_ii_4_7.htmDate retrieved: 17 May 20212 references found. Click X to load a reference inside the current page, click on the title to open in a new page.EPO PCT GL - F (not assigned)XGL-PCT F General Loading...XGL-PCT F II 4 Description (formal requirements) Loading...