[1]Elaine KH Tham, Nora Schneider, and Birit FP Broekman;Infant sleep and its relation with cognition and growth: a narrative review [2]Evelyn Stern, Arthur H. Parmelee, Yoshio Akiyama, Marvin A. Schultz and Waldemar H. Wenner,Pediatrics January 1969, 43 (1) 65-70;SLEEP CYCLE CHARACTERISTICS IN INFANTS