Effective actions for gravity

          @misc{ pirsa_PIRSA:06090033,
            doi = {10.48660/06090033},
            url = {https://pirsa.org/06090033},
            author = {},
            keywords = {Cosmology},
            language = {en},
            title = {Effective actions for gravity},
            publisher = {Perimeter Institute},
            year = {2006},
            month = {sep},
            note = {PIRSA:06090033 see, \url{https://pirsa.org}}
          }