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المصادر: - https://www.telegraph.co.uk/finance/newsbysector/mediatechnologyandtelecoms/electronics/10329499/The-rise-and-fall-of-BlackBerry.html

https://www.theverge.com/2013/3/28/4156178/rim-founder-mike-lazaridis-leaves-blackberry

https://www.businessinsider.com/blackberry-phone-sales-decline-chart-2016-9

https://www.theverge.com/2016/9/30/13119924/blackberry-failure-success

https://globalnews.ca/news/384832/rims-rise-and-fall-a-short-history-of-research-in-motion/

https://money.cnn.com/2011/12/16/technology/thebuzz/index.htm

http://parisinnovationreview.com/articles-en/the-rise-and-fall-of-blackberry

https://digital.hbs.edu/platform-digit/submission/the-rise-and-fall-and-rise-again-of-blackberry/

http://parisinnovationreview.com/articles-en/the-rise-and-fall-of-blackberry

https://www.zdnet.com/article/the-road-to-blackberry-10-the-evolution-of-rims-os-and-bes/

https://spectrum.ieee.org/consumer-electronics/gadgets/the-story-behind-the-blackberry-case

https://www.cio.com/article/2424409/blackberry-battle--rim-ntp-patent-case-takes-new-turn.html