@InProceedings VCCBK09,
author = "Vogel, Daniel and Cudmore, Matthew and Casiez, G\'ery and Balakrishnan, Ravin and Keliher, Liam",
title = "Hand Occlusion with Tablet-sized Direct Pen Input",
booktitle = "CHI'09, the 27th Conference on Human Factors in Computing Systems",
pages = "557--566",
year = "2009",
publisher = "ACM Press",
}