@article{Keizerov:20127I,
  author = "Keizerov, Sergey  and  Rakhmetov, Edward",
  title = "{The mass spectrum of four-dimensional modes in seven-dimensional Kaluza-Klein theory with a spontaneous compactification solution of Freund-Rubin type}",
  doi = "10.22323/1.138.0059",
  journal = "PoS",
  year = 2012,
  volume = "QFTHEP2011",
  pages = "059"
}