Levin, S., V. Lamar Welch, R. A. Bell, and M. L. Casper. “Geographic variation in cardiovascular disease risk factors among American Indians and comparisons with corresponding state populations.” Ethnicity & Health 7.1 (2002): 57-67.
Linton, Druenell E. "Cardiovascular risk factors and events in the Lumbee Native Americans of North Carolina." Journal of the American College of Cardiology (JACC) 47.4 (2006): 167A. June 4, 2006.