Advanced General Relativity - Lecture 11

          @misc{ pirsa_PIRSA:13020026,
            doi = {},
            url = {https://pirsa.org/13020026},
            author = {Sorkin, Rafael},
            keywords = {},
            language = {en},
            title = {Advanced General Relativity - Lecture 11},
            publisher = {Perimeter Institute},
            year = {2013},
            month = {feb},
            note = {PIRSA:13020026 see, \url{https://pirsa.org}}
          }