1. Spotify.
https://www.spotify.com/
. Accessed 28 July 2017
2. Toscana100band contest.
http://toscana100band.it/
. Accessed 28 July 2017
3. Spotify Web API.
https://developer.spotify.com/web-api/
. Accessed 28 July 2017
4. Genius.
https://genius.com/
. Accessed 28 July 2017
5. SoundCloud API.
https://developers.soundcloud.com/docs/api/guide
. Accessed 28 July 2017