Fisher SE, Burgio LD, Thorn BE, Allen-Burge R, Gerstle J, Roth DL, Allen SJ.  2002.  Pain assessment and management in cognitively impaired nursing home residents: association of certified nursing assistant pain report, Minumum Data Set pain report, and analgesic medication use.. Journal of the American Geriatrics Society. 50(1):152-156.