1. American Academy of Pediatrics Task Force on infant positioning and SIDS;American Academy of Pediatrics;Pediatrics,1992
2. Australian Government Department of Health National Physical Activity Recommendations for Children 0-5 years. Australian Government Department of Health, viewed 14 October 2017, http://www.health.gov.au/internet/main/publishing.nsf/content/health-pubhlth-strateg-phys-act-guidelines - npa05.
3. Relationships of equipment use and play positions to motor development at eight months corrected age of infants born preterm;Bartlett;Pediatric Physical Therapy,2003
4. The prone head reaction in the human neonate: relation with sex and tactile sensitivity;Bell;Child Development,1965
5. Wakeful positioning and movement control in young infants: a pilot study;Bridgewater;Australian Journal of Physiotherapy,1999