Preferred Global Slicing

          @misc{ scivideos_PIRSA:16060119,
            doi = {10.48660/16060119},
            url = {https://pirsa.org/16060119},
            author = {Soo, Chopin and Gryb, Sean},
            keywords = {Cosmology},
            language = {en},
            title = {Preferred Global Slicing},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2016},
            month = {jun},
            note = {PIRSA:16060119 see, \url{https://scivideos.org/index.php/pirsa/16060119}}
          }