ZAORSKA, Marzenna. Organization and realization of scientific research on adults with multiple disabilities (on the example of deaf-blind people) abroad – possibilities and limitations. Przegląd Badań Edukacyjnych (Educational Studies Review). Online. 5 December 2014. Vol. 1, no. 18, pp. 91-102. [Accessed 19 June 2025]. DOI 10.12775/PBE.2014.007.