Gulyakin Svyatoslav S. (2016). "Olof Palme's political activities in Swedish Social Democratic Youth League in the 1950s". St. Petersburg State Polytechnical University Journal (4): 114. doi:10.5862/JHSS.255.12 (inactive 19 September 2024).{{cite journal}}: CS1 maint: DOI inactive as of September 2024 (link)