1. Anders, T. and Keener, M. (1985): Development courses of nightime sleep-wake patterns in full-term and premature infants during the first year of life. Sleep, 8, 193–204.
2. Barr, R.G., Kramer, M.S., Boisjoly, C., McVey-White, L. and Pless, I.B. (1988): Parental diary of infant cry and fuss behaviour. Arch. Dis. Child., 63, 380–387.
3. Barr, R.G. (1990): The normal crying curve: what do we really know? [Annotation]. Dev. Med. Child Neurol., 32, 356–362.
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