Black hole information problem

          @misc{ scivideos_strings:20211038,
            doi = {},
            url = {https://scivideos.org/index.php/strings-conferences/20211038},
            author = {},
            keywords = {},
            language = {en},
            title = {Black hole information problem},
            publisher = {},
            year = {2021},
            month = {jun},
            note = {strings:20211038 see, \url{https://scivideos.org/index.php/strings-conferences/20211038}}
          }