Background independance and the left-right distinction

          @misc{ scivideos_PIRSA:05060067,
            doi = {10.48660/05060067},
            url = {https://pirsa.org/05060067},
            author = {Saunders, Simon},
            keywords = {},
            language = {en},
            title = {Background independance and the left-right distinction},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2005},
            month = {jun},
            note = {PIRSA:05060067 see, \url{https://scivideos.org/index.php/pirsa/05060067}}
          }