Refined topological string

          @misc{ scivideos_strings:20121039,
            doi = {},
            url = {https://cast.itunes.uni-muenchen.de/clips/Yulw3vaElS/vod/high_quality.mp4},
            author = {},
            keywords = {},
            language = {en},
            title = {Refined topological string},
            publisher = {},
            year = {},
            month = {},
            note = {strings:20121039 see, \url{https://scivideos.org/index.php/strings-conferences/20121039}}
          }