Recent advances in hearing restoration. Kulkarni K, Hartley D E. Journal of the Royal Society of Medicine 2008; 101: 116-124 .NHSEED.

Evaluation des appareils électroniques correcteurs de surdite. Haute Autoritede Sante. 2008

Hearing Aids for adults. SBU. 2003.

Hearing impairment among adults - The scientific evidence on diagnostic methods and non-invasive treatments. Danish Centre for Evaluation and Health Technology Assessment (DACEHTA). 2003.

The community provision of hearing aids: A systematic review of the evidence. NCCHTA. 2000.  DARE.

Community provision of hearing aids and related audiology services. Health Technology Assessment. 2000; 4(4):1-198. DARE.

The clinical and cost effectiveness of advances in hearing aid technology: report to the National Institute for Clinical Excellence. Taylor R S, Paisley S, Davis A. London: National Institute for Clinical Excellence . 2001: 28.

Efficacité des prothéses auditives analogiques á contróle numérique.  AETMIS. 2003

Efficacité des prothèses auditives analogiques à microphones directionnels. AETMIS. 2003.

Informe sobre el audífono AUDÍGITAL ALFA 128. AETSA. 2002.

Hearing Aids for Adults – Benefits and Costs.  SBU.2003.