1. Bak-Pedersen K, Kildegaard LP (1979) Inflammatory middle ear diseases in patients with cystic fibrosis. Acta Otolaryngol [Suppl] 360:130–140
2. 1 bis. Bocca E, Pellegrini A (1950) Studio statistico sulla composizione della lingua italiana e sua applicazione pratica all'audiometria con la parola. Arch Ital Otol 5:116–141
3. Chrispin AR, Norman AP (1974) The systematic evaluation of the chest radiograph in CF. Pediatr Radiol 2:101–110
4. David TJ (1986) Nasal polyposis, opaque paranasal sinuses and usually normal hearing: the otorhinolaryngological features of cystic fibrosis. J R Soc Med [Suppl] 12:23–26
5. Forcucci RA, Stark EW (1972) Hearing loss, speech-language, and cystic fibrosis. Arch Otolaryngol 96:361–364