C. Xu and K. Lyons, Shimmering Smartwatches, Proceedings of the Ninth International Conference on Tangible, Embedded, and Embodied Interaction, TEI '14, pp.69-76, 2015.
DOI : 10.1145/2677199.2680599

J. Fortmann, V. Cobus, W. Heuten, and S. Boll, WaterJewel, Proceedings of the 13th International Conference on Mobile and Ubiquitous Multimedia, MUM '14, pp.58-67, 2014.
DOI : 10.1007/978-3-540-39653-6_27

R. Xiao, G. Laput, and C. Harrison, Expanding the input expressivity of smartwatches with mechanical pan, twist, tilt and click, Proceedings of the 32nd annual ACM conference on Human factors in computing systems, CHI '14, pp.193-196, 2014.
DOI : 10.1145/2556288.2557017

T. Simon, E. Perrault, J. Lecolinet, Y. Eagan, and . Guiard, Watchit: simple gestures and eyes-free interaction for wristwatches and bracelets, Proceedings of CHI '13. ACM, pp.1451-1460, 2013.