The problem of differentiation of the Ukrainian official-business style. Philological Studies: Scientific Bulletin of Kryvyi Rih State Pedagogical University, [S. l.], v. 7, n. 1, p. 141–146, 2012. DOI: 10.31812/filstd.v7i1.702. Disponível em: https://journal.kdpu.edu.ua/filstd/article/view/702. Acesso em: 5 dec. 2025.