Quantum Field Theory - Lecture 9A

          @misc{ pirsa_PIRSA:12100014,
            doi = {},
            url = {https://pirsa.org/12100014},
            author = {Zarembo, Konstantin},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Quantum Field Theory - Lecture 9A},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {oct},
            note = {PIRSA:12100014 see, \url{https://pirsa.org}}
          }