1. Gastroesophageal reflux and voice disorders;Koufman,1995
2. Reflux monitoring system operation and maintenance manual;2.Sandhill,1993
3. Understanding voice problems;Colton,1990
4. Multi-dimensional voice program (MDVP) model 4305;Kay Elemetrics Corporation,1993
5. Dysphonia as an atypical presentation of gastro-oesophageal reflux;Weiner;J Laryngol Otol,1995