Wilson, Julie S and Elborn, J Stuart and Fitzsimons, Donna and McCrum-Gardner, Evie (2011) Do smokers with chronic obstructive pulmonary disease report their smoking status reliably? A comparison of self-report and bio-chemical validation. International Journal of Nursing Studies, 48, (7), pp. 856-862. https://doi.org/10.1016/j.ijnurstu.2011.01.002.

Wilson, Julie S and Fitzsimons, Donna and Bradbury, Ian and Elborn, J Stuart (2008) Does additional support by nurses enhance the effect of a brief smoking cessation intervention in people with moderate to severe chronic obstructive pulmonary disease? A randomised controlled trial. International Journal of Nursing Studies, 45, (4), pp. 508-517. https://doi.org/10.1016/j.ijnurstu.2006.10.001.