Comparison of effects of supervised versus self-monitored training programmes in patients with chronic obstructive pulmonary disease
L Puente-Maestu, ML Sanz, P Sanz, JM Cubillo, J Mayol, R Casaburi
European Respiratory Journal 2000 15: 517-525; DOI: 10.1034/j.1399-3003.2000.15.15.x