https://www.theguardian.com/media-network/media-network-blog/2012/mar/27/changing-media-summit-press-round-up
http://www.theverge.com/2012/3/22/2892760/universal-music-spotify-sales-digital
http://www.musicweek.com/story.asp?sectioncode=1&storycode=1048922&c=1
https://www.lastminutemusicians.com/blog/is-spotify-worth-it/
https://umusic.co.uk/umusic-blog/mythbusting/237-streaming-music-not-cannibalising-download-sales
https://thenextweb.com/news/changing-media-the-weeks-media-news-in-review
https://the-dots.com/projects/the-guardian-changing-media-summit-153972