P. HAMP, Eric. Indo‑European ’ego’, Slavic ja = Runic ek, and Celtic Ø. Slavia Centralis, [S. l.], v. 4, n. 1, p. 5–13, 2020. DOI: 10.18690/scn.4.1.5–13.2011. Disponível em: https://old.journals.um.si/index.php/slaviacentralis/article/view/675. Acesso em: 8 nov. 2025.