Journal Article
                        
                        Alberts, Marianne, Peter  Urdal, Krisela   Steyn, Inger  Stensvold, Aage  Tverdal, Johanna  Nel, and Nelia P Steyn.  
"Prevalence of cardiovascular diseases and associated risk factors in a rural black population of South Africa." European Journal of Cardiovascular Prevention & Rehabilitation 12, no. 4 (2005): 347-354.