JERMAKOVA, NADEŽDA. A PERSONAL LIBRARY OF KARL GOTTFRIED HAGEN, PROFESSOR OF KONIGSBERG UNIVERSITY (1749–1829) (in Russian). Knygotyra, [S. l.], v. 64, p. 88–113, 2015. DOI: 10.15388/kn.v64i0.8216. Disponível em: https://www.journals.vu.lt/knygotyra/article/view/8216. Acesso em: 5 apr. 2025.