Bringing together contributors from dance, theater, visual studies, and art history, Perform, Repeat, Record addresses the conundrum of how live art is positioned within history.  Set apart from other art forms in that it may never be performed in precisely the same way twice, ephemeral artwork exists both at the time of its staging and long after in the memories of its spectators and their testimonies, as well as in material objects, visual media, and text, all of which offer new critical possibilities
http://www.press.uchicago.edu/ucp/books/book/distributed/P/bo12687320.html