Some links that you might find interesting:
Pedagogy
- a brief narrative of past teachers, the treatises and books they have written, and some related articles
Pedagogy and the Adolescent Voice
- I don't know anything about the author, but she cites the standard sources for her articles
Articles with a focus on Vocal Technique by Shirlee Emmons
- a highly regarded author on the subject
National Center for Voice and Speech Articles by Ingo Titze
- a highly respected voice scientist and regular contributer to the NATS Journal
Anatomy and Physiology
- more info than you want, but well organized with good pictures
- similar to the above but a bit more succinct
Gray's Anatomy (the medical book, not the TV show): The Larynx
- more technical than we need, but classic medical descriptions with good drawings