Wijkstra, P. J., TenVergert, E. M., van der Mark, T. W., Postma, D. S., Van Altena, R., Kraan, J., & Koëter, G. H. (1994). Relation of lung function, maximal inspiratory pressure, dyspnoea, and quality of life with exercise capacity in patients with chronic obstructive pulmonary disease.

Wijkstra, P. J., E. M. TenVergert, T. W. van der Mark, D. S. Postma, R. Van Altena, J. Kraan, and G. H. Koëter. Relation of Lung Function, Maximal Inspiratory Pressure, Dyspnoea, and Quality of Life With Exercise Capacity in Patients With Chronic Obstructive Pulmonary Disease. 1994.

Wijkstra, P. J., et al. Relation of Lung Function, Maximal Inspiratory Pressure, Dyspnoea, and Quality of Life With Exercise Capacity in Patients With Chronic Obstructive Pulmonary Disease. 1994.