1. A two-level concept of vocal registers;Hollien,1976
2. Pilot data on frequency production abilities of singers and non-singers;Hollien;J Res Sing,1977
3. The varying characteristics of the singer's format;Hollien,1978
4. Pilot study of the intelligibility of high-pitched sung vowels;Hollien,1980
5. A perceptual study of registration in female singers;Schoenhard;NATS Bull,1982