3.Lam, Janet C. MD*; Mahone, E. Mark PhD†‡; Mason, Thornton B.A. MD, PhD§; Scharf, Steven M. MD, PhD¶ The Effects of Napping on Cognitive Function in Preschoolers, Journal of Developmental & Behavioral Pediatrics: February 2011 - Volume 32 - Issue 2 - p 90-97 doi: 10.1097/DBP.0b013e318207ecc7