Bibliografia

1) Falk M., Kelstrup M., Andersen J.B.: Improving the ketchup bottle method with positive expiratory pressure, PEP, in cystic fibrosis. Eur. J. Resp. Dis. 1984; 65: 423-432.

2) Oberwaldner B., Evans J.C., Zach M.S.: Forced expiration against a variable resistance. A new chest physiotherapy method in cystic fibrosis. Pediatr. Pulmonol. 1986; 2: 358-367.

3) Pryor J.A.: Respiratory Care. Longman Group UK, 1991.

4) Bellone A.: Riabilitazione Respiratoria Nuovi Orientamenti. Midia Edizioni 1996.