String Theory Review - Lecture 7

          @misc{ scivideos_PIRSA:11020057,
            doi = {},
            url = {https://pirsa.org/11020057},
            author = {Cachazo, Freddy},
            keywords = {},
            language = {en},
            title = {String Theory Review - Lecture 7},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2011},
            month = {feb},
            note = {PIRSA:11020057 see, \url{https://scivideos.org/pirsa/11020057}}
          }