References
- Batschelet , E. 1981 . Circular Statistics in Biology , London : Academic Press .
- Douglas , A. S. , Gupta , R. , Helms , P. J. and Jolliffe , I. T. 1997 . Month of birth as an independent variable in the sudden infant death syndrome . Paediatric and Perinatal Epidemiology , 11 : 57 – 66 .
- Douglas , A. S. , Helms , P. J. and Jolliffe , I. T. 1998 . Seasonality of sudden infant death syndrome in mainland Britain and Ireland 1985–95 . Archives of Disease in Childhood , 79 : 269 – 270 .
- Fisher , N. I. 1993 . Statistical Analysis of Circular Data , Cambridge, , UK : Cambridge University Press .
- Halberg , F. , Johnson , E. A. , Nelson , W. , Runge , W. and Sothern , R. 1972 . Autorhtythmometry procedures for physiologic self-measurements and their analysis . Physiology Teacher , 1 : 1 – 11 .
- Jones , R. H. , Ford , P. M. and Hamman , R. F. 1988 . Seasonality comparisons among groups using incidence data . Biometrics , 44 : 1131 – 1144 .
- Mardia , K. V. and Jupp , P. E. 2000 . Directional Statistics , Chichester, , UK : Wiley .
- Mooney , J. A. , Helms , P. J. and Jolliffe , I. T. 2003 . Fitting mixtures of von Mises distributions: a case study involving sudden infant death syndrome . Computational Statistics and Data Analysis , 41 : 505 – 513 .
- Osmond , C. and Murphy , M. 1988 . Seasonality in the sudden infant death syndrome . Paediatric and Perinatal Epidemiology , 2 : 337 – 345 .
- Roger , J. H. 1977 . A significance test for cyclic trends in incidence data . Biometrika , 64 : 152 – 155 .
- Upton , G. J. G. , Hickey , K. A. and Stallard , A. 2003 . Regression models for cyclic data . Applied Statistics , 52 : 227 – 235 .
- Wakley , T. 1855 . Infants found dead in bed . Lancet , 1 : 103
- Wilks , D. S. 1995 . Statistical Methods in Atmospheric Science: An Introduction , San Diego : Academic Press .