Hi David,
There are 3 ways I would suggest in starting to research caregiving. The one I would personally use is the National Library of Medicine, search there under caregiving, family caregiving, etc. The 2nd is journal by journal; "google" journals by subject: aging, caregiving, dementia, pain, palliative care etc. The 3rd is by the diseases that might be causing the caregiving to be needed: MS, dementia, Huntingtons, ALS, cancer etc.