PSI 2017/2018 - String Theory - Lecture 4

          @misc{ scivideos_PIRSA:18020040,
            doi = {},
            url = {https://pirsa.org/18020040},
            author = {Gaiotto, Davide},
            keywords = {},
            language = {en},
            title = {PSI 2017/2018 - String Theory - Lecture 4},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2018},
            month = {feb},
            note = {PIRSA:18020040 see, \url{https://scivideos.org/pirsa/18020040}}
          }