1. Pew Research Center. Mobile Fact Sheet [Internet]. 2018 [cited 23 Apr 2018]. Available: http://www.pewinternet.org/fact-sheet/mobile/
2. Smith A, Anderson M, Calazza T. Social media use in 2018 [Internet]. 2018. Available: http://assets.pewresearch.org/wp-content/uploads/sites/14/2018/03/01105133/PI_2018.03.01_Social-Media_FINAL.pdf
3. Bagrow JP. Information spreading during emergencies and anomalous events. arXiv:170307362. 2017;
4. Collective Response of Human Populations to Large-Scale Emergencies;JP Bagrow;PLoS One,2011
5. Smith AB. 2017 U.S. billion-dollar weather and climate disasters: a historic year in context. ClimateWatch Magazine. 2018. Available: https://www.climate.gov/news-features/blogs/beyond-data/2017-us-billion-dollar-weather-and-climate-disasters-historic-year. Accessed 23 Apr 2018.