Medline Plus: Laryngitis - Features information on this disorder, its causes, incidence and risk factors. - http://www.nlm.nih.gov/medlineplus/ency/article/001385.htm
Postgraduate Medicine: Laryngitis - Provides the causes and how it should be treated. - http://www.postgradmed.com/issues/1997/12_97/pn_laryn.htm