1. Woolcock AJ, Barnes, PJ: Overview. In Asthma. Edited by Barnes PJ, Grunstein MM, Leff AR, Woolcock AJ. Philadelphia: Lippincott-Raven; 1997:3–8.
2. Global Initiative for Asthma: Global Strategy for Asthma Management and Prevention. NHLBI/WHO Workshop Report. In Bethesda, MD: National Institutes of Health, National Heart, Lung, and Blood Institute; 1995.
3. Undem BJ, Riccio MM: Activation of airway afferent nerves. In Asthma. Edited by Barnes PJ, Grunstein MM, Leff AR, Woolcock AJ. Philadelphia: Lippincott-Raven; 1997:1009–1026.
4. Ricco MM, Kummer W, Biglari B, et al.: Interganglionic segregation of distinct vagal afferent fibre phenotypes in guinea-pig airways. J Physiol 1996, 496:521–530.
5. Widdicombe JG: Receptors in trachea and bronchi of the cat. J Physiol 1954, 123:100–114.