Borrill, Z. L., Houghton, C. M., Tal-Singer, R., Vessey, S. R., Faiferman, I., Langley, S. J., & Singh, D. (2008). The use of plethysmography and oscillometry to compare long-acting bronchodilators in patients with COPD. Blackwell Science Inc.

Borrill, Zoë L., Catherine M. Houghton, Ruth Tal-Singer, S Rupert Vessey, Isidore Faiferman, Stephen J. Langley, ja Dave Singh. The Use of Plethysmography and Oscillometry to Compare Long-acting Bronchodilators in Patients With COPD. Blackwell Science Inc, 2008.

Borrill, Zoë L., et al. The Use of Plethysmography and Oscillometry to Compare Long-acting Bronchodilators in Patients With COPD. Blackwell Science Inc, 2008.