Authors: Larson, JL Covey, MK Wirtz, SE Berry, JK Alex, CG Langbein, WE Edwards, L

Citation: Jl. Larson et al., Cycle ergometer and inspiratory muscle training in chronic obstructive pulmonary disease, AM J R CRIT, 160(2), 1999, pp. 500-507

Authors: Covey, MK Larson, JL Wirtz, S

Citation: Mk. Covey et al., Reliability of submaximal exercise tests in patients with COPD, MED SCI SPT, 31(9), 1999, pp. 1257-1264

Authors: Covey, MK Larson, JL Alex, CG Wirtz, S Langbein, WE

Citation: Mk. Covey et al., Test-retest reliability of symptom-limited cycle ergometer tests in patients with chronic obstructive pulmonary disease, NURS RES, 48(1), 1999, pp. 9-19

Authors: Larson, JL Covey, MK Berry, J Wirtz, S Alex, CG Matsuo, M

Citation: Jl. Larson et al., Discontinuous incremental threshold loading test - Measure of respiratory muscle endurance in patients with COPD, CHEST, 115(1), 1999, pp. 60-67