 Pari gbolohun ti o tẹle: Pessi ṣe aṣoju SKP ni ọpọlọpọ awọn apejọ kariaye pataki ti iṣipopada komunisti agbaye; ni 19th 1952, 22nd 1961 ati : 23rd 1966 congress of the Communist Party of the Soviet Union, the 1957 and 1960 International Meeting of Communist and Workers Parties and the 50th anniversary of the October Revolution. Ìpàdé Àgbáyé ti Àwọn Ẹgbẹ Kọmúníìsì àti Àwọn Ẹgbẹ Òṣìṣẹ ní 1957 àti 1960 àti àyájọ àádọta ọdún Ìyípadà October. 