Advanced General Relativity - Lecture 6

          @misc{ pirsa_PIRSA:12010156,
            doi = {},
            url = {https://pirsa.org/12010156},
            author = {Poisson, Eric},
            keywords = {},
            language = {en},
            title = {Advanced General Relativity - Lecture 6},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {jan},
            note = {PIRSA:12010156 see, \url{https://pirsa.org}}
          }