PSI 2018/2019 - Explorations in Quantum Gravity - Lecture 4

          @misc{ pirsa_PIRSA:19030071,
            doi = {},
            url = {https://pirsa.org/19030071},
            author = {Dupuis, Ma{\"\i}t{\'e}},
            keywords = {Quantum Gravity},
            language = {en},
            title = {PSI 2018/2019 - Explorations in Quantum Gravity - Lecture 4},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {mar},
            note = {PIRSA:19030071 see, \url{https://pirsa.org}}
          }