Kyrc, Barbara. “Development of Language Competence of Bilingual Children During the Early School Years – a Longitudinal Case Study”. Acta Universitatis Lodziensis. Kształcenie Polonistyczne Cudzoziemców 25 (February 27, 2019): 171–186. Accessed May 19, 2024. https://czasopisma.uni.lodz.pl/kpc/article/view/4317.