Relativity - Lecture 13

          @misc{ scivideos_PIRSA:12090035,
            doi = {},
            url = {https://pirsa.org/12090035},
            author = {Duff, Michael},
            keywords = {},
            language = {en},
            title = {Relativity - Lecture 13},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2012},
            month = {sep},
            note = {PIRSA:12090035 see, \url{https://scivideos.org/index.php/pirsa/12090035}}
          }