Discussion Session 4

          @misc{ scivideos_PIRSA:17060104,
            doi = {10.48660/17060104},
            url = {https://pirsa.org/17060104},
            author = {Boyle, Latham and Feldbrugge, Job and Turok, Neil},
            keywords = {Cosmology},
            language = {en},
            title = {Discussion Session 4},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {jun},
            note = {PIRSA:17060104 see, \url{https://scivideos.org/pirsa/17060104}}
          }