PT Journal AU Bendova, P Cechackova, M Fialova, K SO e-Pedagogium PY 2012 BP 7 EP 23 VL 12 IS 2 DI 10.5507/epd.2012.021 DE Augmentative communication; alternative communication; functional communication; diagnostics; special primary school; pupil; intellectual disabilities; communication skills; social skills ER