1. Android Developer Documentation. 2019a. Permissions overview. https://developer.android.com/guide/topics/permissions/overview Retrieved May 19 2019 from Android Developer Documentation. 2019a. Permissions overview. https://developer.android.com/guide/topics/permissions/overview Retrieved May 19 2019 from
2. Android Developer Documentation. 2019b. Sensors overview. https://developer.android.com/guide/topics/sensors/sensors_overview Retrieved May 19 2019 from Android Developer Documentation. 2019b. Sensors overview. https://developer.android.com/guide/topics/sensors/sensors_overview Retrieved May 19 2019 from
3. Apple Developer Documentation. 2019. Core Motion Framework. https://developer.apple.com/documentation/coremotion Retrieved May 19 2019 from Apple Developer Documentation. 2019. Core Motion Framework. https://developer.apple.com/documentation/coremotion Retrieved May 19 2019 from
4. An autonomic and permissionless Android covert channel