SFT for noncritical strings revisited

          @misc{ scivideos_SAIFR:2245,
            doi = {},
            url = {https://youtu.be/soMxLek1uj0?t=6286},
            author = {},
            keywords = {ICTP-SAIFR, IFT, UNESP},
            language = {en},
            title = {SFT for noncritical strings revisited},
            publisher = { ICTP South American Institute for Fundamental Research},
            year = {2020},
            month = {jun},
            note = {SAIFR:2245 see, \url{https://scivideos.org/ictp-saifr/2245}}
          }