1. Portable oxygen and exercise tolerance in patients with chronic hypoxic cor pulmonale;Leggett, R.J.E.; Flenley, D.C.;BMJ,1977
2. Oxygen assisted exercise in chronic obstructive lung disease;Bradley, B.L.; Garner, A.E.; Billiu, D.; Messtas, J.M.; Forman, J.;Am Rev Respir Dis,1978
3. Breathlessness and portable oxygen in chronic obstructive airways disease;Waterhouse, J.C.; Howard, P.;Thorax,1983
4. Oxygen relieves breathlessness in "pink puffers.";Woodcock, A.A.; Geddes, D.M.; Gross, E.R.;Lancet,1981
5. Supplemental oxygen and exercise ability in chronic obstructive airways disease;Davidson, A.C.; Leach, R.; George, R.J.D.; Geddes, D.M.;Thorax,1988