UNDORF, W. Rainer Knapas, Kunskapens rike. Helsingfors universitetsbibliotek – National-biblioteket 1640–2010. Historisk Tidskrift för Finland, [S. l.], v. 99, 2014. Disponível em: https://journal.fi/htf/article/view/56059. Acesso em: 6 maj. 2024.