Tweeddale, P. M., Merchant, S., Leslie, M., Alexander, F., & McHardy, G. J. (1984). Short term variability in FEV1: Relation to pretest activity, level of FEV1, and smoking habits.

Tweeddale, P M., S. Merchant, M. Leslie, F. Alexander, and G J. McHardy. Short Term Variability in FEV1: Relation to Pretest Activity, Level of FEV1, and Smoking Habits. 1984.

Tweeddale, P M., et al. Short Term Variability in FEV1: Relation to Pretest Activity, Level of FEV1, and Smoking Habits. 1984.