TONDEL, Roman. Electronic documents in the Social Documents Section of the University Library in Toruń. Folia Toruniensia, [S. l.], v. 18, p. 219–238, 2018. DOI: 10.12775/FT.2018.012. Disponível em: https://apcz.umk.pl/FT/article/view/FT.2018.012. Acesso em: 5 feb. 2025.