Black Hole Entropy

          @misc{ pirsa_PIRSA:04100040,
            doi = {},
            url = {https://pirsa.org/04100040},
            author = {Lewandowski, Jerzy},
            keywords = {},
            language = {en},
            title = {Black Hole Entropy},
            publisher = {Perimeter Institute},
            year = {2004},
            month = {oct},
            note = {PIRSA:04100040 see, \url{https://pirsa.org}}
          }