1. Fourth programme report, 1988-1989. ARI programme for control of acute respiratory infections;World Health Organisation,1990
2. Chest and lungs. Mosby's guide to physical examination;Seidel, H.M.,1987
3. Sequential 22-hour profsles of breathing patterns and heart rate in 110 full-term infants during their first 6 months of life;Richards, J.M.; Alexander, JR, Shinebourne; E.A.;Pediatrics,1984
4. Respiratory rate and severity of illness in babies under 6 months old;Morley, C.J.; Thornton, A.J.; Fowler, M.A.;Arch Dis Child,1990
5. Statistical methods for assessing agreement between two methods of clinical measurement;Bland, J.M.; Altman, D.G.;Lancet,1986