International applications must be filed using the PCT request form (PCT/RO/101) and submitted either electronically or on paper.
Source: http://www.epo.org/law-practice/legal-texts/html/guidelinespct/e/a_ii_1_2.htm
Date retrieved: 17 May 2021
Source: http://www.epo.org/law-practice/legal-texts/html/guidelinespct/e/a_ii_1_2.htm
Date retrieved: 17 May 2021