1. Endacott, R., Botti, M., 2007. Clinical research 3: sample selection. Accident and Emergency Nursing, doi:10.1016/j.aaen.2006.12.006.
2. Introduction to Research in the Health Sciences;Polgar,1995
3. Research in Health Care;Sim,2000
4. A brief survey of univariate group comparison procedures;Story,2004
5. The effect of three wound dressings on infection, healing, comfort and cost in patients with sternotomy wounds: a randomized trial;Wynne;Chest,2004