1. Consumer Confidence and Opinion Survey- Consumers in Asia Pacific-Our Sleeping Patterns;ACNielsen Company,2004
2. Article reviewed: mortality associated with sleep duration and insomnia;Allen;Sleep Med.,2002
3. AQA A-level, Psychology PYA4: Function of Sleep;Amaranath,2015
4. Body dimension measurements for pillow design for Taiwanese;Chen,2012
5. DynaDx Corporation, 2015, http://dynadx.com/en/product.htm.