@article{Gitman:2014wU,
  author = "Gitman, Dmitry  and  Baldiotti, Mario Cesar  and  Santos, Marcelo Meireles",
  title = "{Two and three coupled spins in magnetic field}",
  doi = "10.22323/1.200.0009",
  journal = "PoS",
  year = 2014,
  volume = "ICMP 2013",
  pages = "009"
}