1. MARSHALL (model 80) instruction manual
2. O'Brien,E. and O'Malley, K. HANDBOOK OF HYPERTENSION; Vol.14: Blood Pressure Measurement. Elsevier Science Publishers,1991.
3. OMRON (model HEM-605) instruction manual
4. OMRON (model HEM-806F) instruction manual
5. OMRON (model HEM-711) instruction manuel