13/14 PSI - Quantum Gravity Review - Lecture 9

          @misc{ pirsa_PIRSA:14020071,
            doi = {},
            url = {https://pirsa.org/14020071},
            author = {Dittrich, Bianca},
            keywords = {},
            language = {en},
            title = {13/14 PSI - Quantum Gravity Review - Lecture 9},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {feb},
            note = {PIRSA:14020071 see, \url{https://pirsa.org}}
          }