Ståhlberg M R, Savilahti E
Arch Dis Child. 1986 Dec;61(12):1232-3. doi: 10.1136/adc.61.12.1232.
In a double blind crossover study 10 children with infantile colic were fed breast milk and cow's milk formula, untreated and treated with lactase. Colic was present on 71% of breast milk and 89% of cow's milk days. Daily duration and severity of colic did not differ for milk preparations.