1. Results of experiments with human larynges;Berg;Pract. Otol. Rhinol. Laryngol,1959
2. Phonosurgery, basic and clinical investigations;Hirano;Otologica Fukuoka,1975
3. Functional surgery of the larynx;Isshiki,1977
4. Recent advances in phonosurgery;Isshiki;Folia Phoniatr.,1980
5. Phonosurgery to change vocal pitch;Isshiki;HNO-Praxis (Leipzig),1981