H. G. Özel, G. Köksal, Y. Koçum, T. Coşkun, S. Sivri, and M. Ertürk, “The effects of omega-3 supplementation on anthropometric measurements, biochemical parameters and cognitive development in children with phenylketonuria”, Bes Diy Derg, vol. 35, no. 2, pp. 9–20, Jul. 2007.