String Theory Review - Lecture 3

          @misc{ scivideos_PIRSA:11020050,
            doi = {},
            url = {https://pirsa.org/11020050},
            author = {Cachazo, Freddy},
            keywords = {},
            language = {en},
            title = {String Theory Review - Lecture 3},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2011},
            month = {feb},
            note = {PIRSA:11020050 see, \url{https://scivideos.org/index.php/pirsa/11020050}}
          }