OSOWICKA-KONDRATOWICZ, M. . On problems of speech development – A study among five-year-old children from the city of Olsztyn. Prace Językoznawcze, [S. l.], v. 25, n. 4, p. 53–64, 2023. DOI: 10.31648/pj.9351. Disponível em: https://czasopisma.uwm.edu.pl/index.php/pj/article/view/9351. Acesso em: 15 may. 2024.