http://www.stephenhough.com/writings/selective/problems-playing-piano.php
http://www.npr.org/blogs/deceptivecadence/2013/09/03/216906386/10-easy-ways-to-optimize-your-music-practice?ft=1&f=10003
http://news.harvard.edu/gazette/story/2013/08/the-look-of-music/
6 Grand & Beautiful Piano Solos: Advanced Favourites of All Time http://artiden.com/grand/