@article{yoshikawa_koyama_kunimoto_okubo_ohta_koizumi_inoue_fujiwara_takeda_2002, 
  title={25pWE-5 The electronic states of GaAs:Er codoped with Oxygen and Zn analyzed by ESR}, 
  volume={57.1.4}, 
  DOI={10.11316/jpsgaiyo.57.1.4.0_636_2}, 
  number={0}, 
  publisher={The Physical Society of Japan}, 
  author={Yoshikawa, J. and Koyama, R. and Kunimoto, T. and Okubo, S. and Ohta, H. and Koizumi, A. and Inoue, K. and Fujiwara, Y. and Takeda, Y.}, 
  year={2002}
  }