@book{CTT100638597,
  author = {S. Okubo and K.  Hazuki and T. Sakurai and H. Ohta and H. Yoshida and M. Azuma and M. Takano},
  title = {Millimeter and Submillimeter wave ESR Measurement of Spin Ladder System Sr(Cu1-xZnx)2O3},
  publisher = {Elsevier Science B.V},
  year = 2002,
}