General Boundaries and Transition Amplitudes in Quantum Gravity

          @misc{ scivideos_PIRSA:04100024,
            doi = {},
            url = {https://pirsa.org/04100024},
            author = {},
            keywords = {},
            language = {en},
            title = {General Boundaries and Transition Amplitudes in Quantum Gravity},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2004},
            month = {oct},
            note = {PIRSA:04100024 see, \url{https://scivideos.org/index.php/pirsa/04100024}}
          }