PETREIKIS, Tomas. Underground Press of Social Democratic Organizations in Šiauliai in 1904–1914. Knygotyra, [S. l.], v. 77, p. 236–276, 2021. DOI: 10.15388/Knygotyra.2021.77.94. Disponível em: https://www.zurnalai.vu.lt/knygotyra/article/view/25286. Acesso em: 4 jan. 2026.