◇ YouTube - Perpetuum Mobile
http://jp.youtube.com/watch?v=FvbCV6E0Wro
◇ YouTube - Penguin Cafe Orchestra - Perpetuum Mobile
http://jp.youtube.com/watch?v=A4DHmusHaRk
◇ The Penguin Cafe Orchestra 'Signs of Life'
http://www.amazon.co.jp/dp/B001AI93SQ