1. HeislerY.: ‘List of most popular iOS and Andriod apps in 2016’. Available at:http://bgr.com/2016/02/04/most‐popular‐smartphone‐apps‐facebook‐google/ accessed 15 November 2016
2. Deep computation model for unsupervised feature learning on big data;Zhang Q.;IEEE Trans. Serv. Comput.,2016
3. Governors Highway Safety Association: ‘Pedestrian traffic fatalities by state: 2015 preliminary data’. Available at:http://www.ghsa.org/files/pubs/spotlights/spotlight_ped2015.pdf accessed 20 November 2016
4. Practicing Safe Text: the Impact of Texting on Walking Behavior
5. PPHOCFS