Zwakhalen, S. M. G., Hamers, J. P. H., Abu-Saad, H., & Berger, M. P. F. (2006). Pain in elderly people with severe dementia: A systematic review of behavioural pain assessment tools. BMC Geriatrics, 6(1), 3. doi:10.1186/1471-2318-6-3
Zwakhalen, S. M. G., Hamers, J. P. H., Abu-Saad, H., & Berger, M. P. F. (2006). Pain in elderly people with severe dementia: A systematic review of behavioural pain assessment tools. BMC Geriatrics, 6(1), 3. doi:10.1186/1471-2318-6-3