PSI 2014/2015 - Quantum Gravity - Lecture 4

          @misc{ scivideos_PIRSA:15020053,
            doi = {},
            url = {https://pirsa.org/15020053},
            author = {Dittrich, Bianca},
            keywords = {Quantum Gravity},
            language = {en},
            title = {PSI 2014/2015 - Quantum Gravity - Lecture 4},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2015},
            month = {feb},
            note = {PIRSA:15020053 see, \url{https://scivideos.org/index.php/pirsa/15020053}}
          }