Khan, Shoaib Ali, et al. “ANALGESIC EFFECT OF SUCROSE OBSERVED DURING HEEL PRICK IN HEALTHY NEONATES: Analgesic Effects of Sucrose”. Pakistan Armed Forces Medical Journal, vol. 59, no. 3, Sept. 2009, pp. 344-48, https://www.pafmj.org/PAFMJ/article/view/1793.