SADOWSKA, Sławomira. Integrated Education of Children with Intellectual Disability – Critical Review of the First Structural Changes in the Educational System. Przegląd Badań Edukacyjnych (Educational Studies Review). Online. 20 February 2017. Vol. 2, no. 23, pp. 125-144. [Accessed 25 March 2025]. DOI 10.12775/PBE.2016.076.