GAVRILOV, Alexander; KEYER, Denis. Preface. Hyperboreus, Bern, v. 27, n. 1, p. 4–5, 2021. DOI: 10.36950/GIWQ4923. Disponível em: https://sjer.ch/index.php/Hyperboreus/article/view/11805. Acesso em: 8 jun. 2025.