Junjun Fan Run Su Yuansong Sun Peiyu Guan Yujie Chen Jie Liu 0029 Feng Tian 0001 AccPen: Using Smartphone with Accelerometer to Interact as Pen. 100-103 2018 CCHI https://doi.org/10.1145/3202667.3202681 conf/cchi/2018 db/conf/cchi/cchi2018.html#FanSSGCL018