PSI 2019/2020 - Gravitational Physics - Lecture 4

          @misc{ scivideos_PIRSA:20010048,
            doi = {},
            url = {https://pirsa.org/20010048},
            author = {Gregory, Ruth},
            keywords = {Quantum Gravity, Strong Gravity},
            language = {en},
            title = {PSI 2019/2020 - Gravitational Physics - Lecture 4},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2020},
            month = {jan},
            note = {PIRSA:20010048 see, \url{https://scivideos.org/pirsa/20010048}}
          }