1. Kratz, S., Aumi, T.: AirAuth: evaluating in-air hand gestures for authentication. In: MobileHCI 2014 (2014)
2. Bashir, M., Scharfenberg, G., Kempf, J.: Person authentication by handwriting in air using a biometric smart pen device. In: BIOSIG 2011, pp. 219–226 (2011)
3. Vikram, S., Li, L., Russell, S.: Handwriting and gestures in the air, recognizing on the fly. In: CHI 2013 Extended Abstracts (2013)
4. Leap Motion.
https://www.leapmotion.com/
. Accessed 25 March 2015