Łockiewicz, Marta, i Martyna Jaskulska. „Polish As L1, English As L2: the Linguistic Transfer Impact on Second Language Acquisition Stemming from the Interlingual Differences: Implications for Young Learners Education”. Problemy Wczesnej Edukacji, t. 37, nr 2, marzec 2017, s. 68-76, doi:10.5604/01.3001.0010.5589.