1. Disorders of laryngeal function;Arnold,1973
2. Clinical Voice Disorders;Aronson,1980
3. Treatment of nodules of vocal cords by chewing methods;Brodnitz;Arch. Otolaryngol.,1954
4. Maudsley Personality Inventory;Eysenck,1959
5. Vocal cord dysfunction—an industrial health hazard;Rontal;Ann. Otol.,1979