GAVRILOV, Alexander; KEYER, Denis. Preface. Hyperboreus, Bern, v. 27, n. 1, p. 4–5, 2021. DOI: 10.36950/hyperboreus.GIWQ4923. Disponível em: https://bzl-online.ch/index.php/Hyperboreus/article/view/11805. Acesso em: 16 aug. 2025.