1. Alpiner, J. G., Cheurette, W., Glascoe, G., et al.: The Denver scale of communicative function. Unpublished study, The University of Denver, Denver, Colorado, 1974.
2. Clinical results of rehabilitation;Banfai;Acta Otolaryngol. (Stockh.),1984
3. The Mueller-Walle Method of Lipreading;Bruhn,1949
4. Speech Reading—Jena Method;Bunger,1961
5. Information and linguistic aspects of communication;Chermak,1981