1. Twelve minute walking test for assessing disability in chronic bronchitis;McGavin, C.R.; Gupta, S.P.; McHardy, G.J.R.,1976
2. Performance, ventilation and oxygen consumption in three different types of exercise tests in patients with chronic obstructive lung disease;Swinburn, C.R.; Wakefield, J.M.; Jones, P.W.;Thorax,1985
3. Psychological factors contributing to disproportionate disability in chronic bronchitis;Morgan, A.D.; Peck, D.F.; Buchanan, D.R.; McHardy, G.J.R.;J Psychosomii Res,1983
4. Measurements of dyspnea. Contents, interobserver correlates of two new clinical indices;Mahler, D.A.; Weinberg, D.H.; Wells, C.K.; Feinstein, A.R.;Chest,1984
5. Effect of arterial oxygen desaturation on six minute walk distance, perceived effort, and perceived breathlessness in patients with airflow limitation;Mak, V.H.F.; Bugler, JR, Roberts; CM, Spiro; S.G.;Thorax,1993