@article{CTT100609168,
  author = {A. Ohtomo and H. Kimura and K. Saito and T. Makino and Y. Segawa and H. Koinuma and M. Kawasaki},
  title = {Lateral grain size and electron mobility in ZnO epitaxial films grown on sapphire substrates},
  journal = {Journal of Crystal Growth},
  year = 2000,
}