@article{CTT100609379,
  author = {J. W. Tomm and B. Ullrich and X. G. Qiu and Y. Segawa and A. Ohtomo and M. Kawasaki and H. Koinuma},
  title = {Optical and photoelectrical properties of oriented ZnO films},
  journal = {Journal of Applied Physics},
  year = 2000,
}