@article {1992,
	title = {Direct Observation of Hydrogen Etching Anisotropy on Diamond Single Crystal Surfaces.},
	journal = {Phy. Rev. Lett.},
	volume = {78},
	year = {1997},
	pages = {3713-3716},
	attachments = {https://labs.iams.sinica.edu.tw/project/sites/default/files/jclin/files/17-phy._rev._lett._vol_78_p_3713-3716_1997.pdf},
	author = {C.-L. Cheng and H.-C. Chang and J.-C. Lin and K.-J. Song and J.-K. Wang}
}
