Also see Christina Maslach's books on burnout. She doesn't focus exclusively on health workers, but they are noted as a group which is particularly prone to burnout.

(Edit: I just read the article, and see that the author cited Maslach already.)

Yep - I mentioned Christina's book in my article as a great resource. My wife is a therapist, and she sees a lot of other people in the field struggling with the same issues, especially for those who work with high-risk groups.

Yes, Maslach is one of the experts/pioneers in burnout research. She created the Maslach Burnout Inventory, and is highly cited.