Burchfiel, C.M.; Higgins, M.W.; Keller, J.B.; Howatt, W.F.; Butler, W.J. and Higgins, I.T.T., Passive smoking in childhood: respiratory conditions and pulmonary function in Tecumseh, Michigan, Am. Rev. Respir. Dis. (1986) vol. 133: 966 – 973.
Burney, P., A diet rich in sodium may potentiate asthma: epidemiologic evidence for a new hypothesis, Chest. (1987) vol. 91: 1435 – 1485.
Burney, P.G.J.; Neild, J.E.; Twort, C.H.C.; Chinn, S., Jones, T.D., Mitchell, W.D. et al., Effect of changing dietary sodium on the airway response to histamine,Thorax (1989) vol. 44: 36 – 41.
*Burroughs, W., Does the weather really matter? The social implications of climate change, Cambridge University Press, Cambridge, 1997.
Butland, B.K., Strachan, D.P. and Anderson, H.R., The home environment and asthma symptoms in childhood: two population based case-control studies 13 years apart, Thorax (1997) vol. 52: 618-624.
Central Health Monitoring Unit, Asthma: An Epidemiological Overview, Department of Health. Central Health Monitoring Unit Epidemiological Overview Series. London, HMSO, 1995.
Chan-yeung, M. and Jean-Luc, M., Current concepts: occupational asthma, NEJM (1995) vol. 333, nº 2.
ChilmonczyK, B.A.; Salmun, L.M.; Megathlin, K.N.; Neveux, L.M.; Palomaki, G.E.; Knight, G.J.; Pulkkinen, A.J. and Haddow, J.E., Association between exposure to environmental tobacco smoke and exacerbations of asthma in children, NEJM (1993) vol. 328: 1665-1669.
*Colls, J., Air Pollution, an introduction, E & FN Spon, London, 1997.
*Cooper, D., Palmer, J. (ed.), Spirit of the environment, religion, value and environmental concern, Routledge, London, 1998.
D’Amato, G., Pollen allergy in the mediterranean area, Revista Portuguesa de Imunoalergologia (1998), vol.6, nº2, 96-98.
Dekker, C.; Dales, R.; Bartlett, S.; Brunekreef,B., Znenburg, H., Childhood asthma and the indoor environment, Chest (1991) vol. 100: 922 – 926.
Dijkstra, L.; Houthuijs,D.; Brunekreef, B.; Akkerman, I., Boleij, J.S.M., Respiratory health effects of the indoor environment in a population of Dutch children, Am. Rev. Respir. Dis. (1990) vol. 142: 1172 – 1178.
Dodge, R., The effects of indoor pollution on Arizona children, Arch. Environ. Health (1982) vol. 37: 151 – 155.
Douglas, I. - Urban Environment. Edward Arnold: London, 1983, 229 p.
Douglas, I., Urban planning policies for physical constraints and environmental change, In Hooke, J. M. (ed.), Geomorphology in Environmental Planning. Wiley: Chichester, 1988, p. 63 - 86.
Douglas, I., The environmental problems of cities, In Herbert, D. T. and Smith, D. M. (eds.), Social Problems and the City: Near Perspectives, Oxford University Press, Oxford, 1989, p. 81 - 99