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2. Parental diary of infant cry and fuss behavior;Barr;Archives of Disease in Childhood,1988
3. Feeding and temperament as determinants of early infant crying and fussing behavior;Barr;Pediatrics,1989
4. Normality: a clinically useless concept: the case of infant crying and colic;Barr;Journal of Developmental and Behavioral Pediatrics,1993