Wallis, E. J., Ramsay, L. E., Haq, I. U., Ghahramani, P., Jackson, P. R., Rowland-Yeo, K., & Yeo, W. W. (2000). Coronary and cardiovascular risk estimation for primary prevention: Validation of a new Sheffield table in the 1995 Scottish health survey population. British Medical Journal.

Wallis, Erica J., Lawrence E. Ramsay, Iftikhar Ul Haq, Parviz Ghahramani, Peter R. Jackson, Karen Rowland-Yeo, e Wilfred W. Yeo. Coronary and Cardiovascular Risk Estimation for Primary Prevention: Validation of a New Sheffield Table in the 1995 Scottish Health Survey Population. British Medical Journal, 2000.

Wallis, Erica J., et al. Coronary and Cardiovascular Risk Estimation for Primary Prevention: Validation of a New Sheffield Table in the 1995 Scottish Health Survey Population. British Medical Journal, 2000.