1. The number of smartphone users in the world is expected to reach a giant 6.1 billion by 2020;Boxall,2015
2. Privacy-respecting digital investigation;Dehghantanha,2014
3. A review of free cloud-based anti-malware apps for android;Walls,2015
4. Market share: final pcs, ultramobiles and mobile phones, all countries, 2q15 update;Kitagawa,2015
5. How cyber-savvy are older mobile device users?;Chia,2017