Mathematical Physics - Lecture 9

          @misc{ pirsa_PIRSA:11120001,
            doi = {},
            url = {https://pirsa.org/11120001},
            author = {Bender, Carl},
            keywords = {Mathematical physics},
            language = {en},
            title = {Mathematical Physics - Lecture 9},
            publisher = {Perimeter Institute},
            year = {2011},
            month = {dec},
            note = {PIRSA:11120001 see, \url{https://pirsa.org}}
          }