PYSTYNEN, J. On the development of *i in Permic. Finnisch-Ugrische Forschungen, [S. l.], v. 2020, n. 65, p. 62–97, 2020. DOI: 10.33339/fuf.84873. Disponível em: https://journal.fi/fuf/article/view/84873. Acesso em: 19 sep. 2021.