1. Twelve-minute walking test for assessing disability in chronic bronchitis;McGavin, C.R.; Gupta, S.P.; McHardy, G.J.R.;BMJ,1976
2. Two-, six-, and 12-minute walking tests in respiratory diseases;Butland, R.J.A.; Gross, E.R.; Pang, J.; Woodcock, A.A.; Geddes, D.M.;BMJ,1982
3. Effect of encouragement on walking test performance;Guyatt, G.H.; Pugsley, S.O.; Sullivan, M.J.; Thompson, P.J.; Berman, L.B.; Jones, N.L.;Thorax,1984
4. A self paced treadmill walking test for breathless patients;Beaumont, A.; Cockcroft, A.; Guz, A.;Thorax,1985
5. Clinical exercise testing;Jones, N.L.,1988