@article {RN19,
	title = {Gigahertz frequency doubler based on millimeter-scale single-crystal graphene{\textquoteright}},
	journal = {Acta Physica Sinica},
	volume = {66},
	number = {21},
	year = {2017},
	type = {Journal Article},
	issn = {1000-3290},
	doi = {10.7498/aps.66.217305},
	url = {\&lt;Go to ISI\&gt;://WOS:000417418600021},
	author = {Gao, Qing-Guo and Tian, Meng-Chuan and Li, Si-Chao and Li, Xue-Fei and Wu, Yan-Qing}
}
