1. Apple Watch, https://www.apple.com/watch/ (retrieved March, 2015).
2. Samsung Gear, http://www.samsung.com/us/mobile/wearable-tech (retrieved March, 2015).
3. iHealth Edge, http://www.ihealthlabs.com/fitness-devices/ihealth-edge/ (retrieved March, 2015).
4. A review and taxonomy of activity recognition on mobile phones;Incel;BioNanoScience,2013
5. Toss’n’turn: smartphone as sleep and sleep quality detector;Min,2014