13/14 PSI - Gravitational Physics Review - Lecture 6

          @misc{ pirsa_PIRSA:14010034,
            doi = {},
            url = {https://pirsa.org/14010034},
            author = {Gregory, Ruth},
            keywords = {},
            language = {en},
            title = {13/14 PSI - Gravitational Physics Review - Lecture 6},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {jan},
            note = {PIRSA:14010034 see, \url{https://pirsa.org}}
          }