8[3]Andersson G, Lyttkens L, Larsen HC (1999) Distinguishing levels of tinnitus distress. Clin-Otolaryngol. 24(5): 404-10.
9[4]Baguley DM, Stoddart RL, Hodgson C (in press ) Convergent validity of the Tinnitus Handicap inventory and the Tinnitus Questionnaire.Journal of Laryngology and Otology.
10[5]Burns EM (1984) A comparison of variability among measurements of subjective tinnitus and objective stimuli. Audiol 23:426-440.