Journal Article
                        
                        Groenewald, P., T.  Vos, R.  Norman, R.  Laubscher, C.  Van Walbeek, U.  Saloojee, F.  Sitas, and D.  Bradshaw.  
"Estimating the burden of disease attributable to smoking in South Africa in 2000." South African Medical Journal 97, no. 8 (2007): 674-681.