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http://data.europa.eu/eli/reg/2016/679/oj
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https://www.fail2ban.org/wiki/index.php/Main_Page
. Accessed 09 Feb 2020
3. Guardian circle.
https://guardiancircle.com/
. Accessed 09 Feb 2020
4. Apple: fall detection functionality.
https://support.apple.com/en-us/HT208944
. Accessed 09 Feb 2020
5. FreeTSA.org: Freetsa.
https://www.freetsa.org/index_en.php
. Accessed 09 Feb 2020