KURFÜRSTOVÁ, Petra, Iveta ŠAFRATOVÁ and
Linda DOLEŽÍ. Acquisition of polarity items in Czech children: An experimental study.
Crossroads: A Journal of English Studies. 2020, vol. 2020, No 30, p. 39-56. ISSN 2300-6250. Available from: https://dx.doi.org/10.15290/CR.2020.30.3.03.