ČOP, B. Sur l’origine des themes pronominaux sigmatiques des langues indo-européennes. Linguistica, [S. l.], v. 21, n. 1, p. 73–103, 1981. DOI: 10.4312/linguistica.21.1.73-103. Disponível em: https://journals.uni-lj.si/linguistica/article/view/4846. Acesso em: 29 may. 2023.