1. Resistive breathing training in severe chronic obstructive pulmonary disease: a pilot study;Andersen;Scand J Respir Dis,1979
2. Ventilatory muscle training improves exercise capacity in chronic obstructive pulmonary disease patients;Belman;Am Rev Respir Dis,1980
3. Inspiratory muscle training compared with physiotherapy in patients with chronic airflow limitation;Pardy;Am Rev Respir Dis,1981
4. The effects of inspiratory muscle training on exercise performance in chronic airflow limitation;Pardy;Am Rev Respir Dis,1981
5. Increased exercise performance in patients with severe COPD following inspiratory resistive training;Sonne;Chest,1982