1. Esophageal Speech after Total Laryngectomy;Damste,1958
2. Vowel duration characteristics of esophageal speech;Christensen;J Speech Hear Res,1976
3. Finnish oesophageal speech after laryngectomy: sound spectrographic and cineradiographic studies;Kyatta;Acta Otolaryng,1964
4. A comparative study of vowel formants of esophageal and normal-speaking adults;Rollins,1962
5. Formant frequency characteristics of esophageal speech;Sisty;J Speech Hear Res,1972