1. Australian Physiotherapy Association, 2008. Neck pain poster. Marketing Solutions.
2. Sleep positions and position shifts in five age groups: an ontogenetic picture;DeKoninck;Sleep,1992
3. Muscle contraction headache;Elkind;Postgraduate Medicine,1987
4. Support pillow;Emberson;Physiotherapy,1985
5. A preliminary study assessing adverse effects of a semi-customized cervical pillow on asymptomatic adults;Erfanian;Journal of the Canadian Chiropractic Association,1998