http://static.squarespace.com/static/520cf78be4b0a5dd07f51048/t/52f57354e4b008f86b8a52b6/1391817556763/Strohminger.Nichols.2014.pdf
http://static.squarespace.com/static/520cf78be4b0a5dd07f51048/t/52f57354e4b008f86b8a52b6/1391817556763/Strohminger.Nichols.2014.pdf