@article{Buttsev:9459,
      author       = "Buttsev, V.S. and Chultem, D. and Gavrilov, Yu.K. and
                      Ganzorig, D. and Presperin, V.",
      title        = "Negative Pion Capture by Medium Nuclei in the Z
                      Approximately. 50 Region",
      year         = "1977",
}