@conference { KJEY11, title = {Direct Manipulation Through Surrogate Objects}, booktitle = {ACM SIGCHI Conference on Human Factors in Computing Systems}, month = {May}, pages = {627-636}, doi = {10.1145/1978942.1979033}, year = {2011}, author = {Kwon, Bum Chul and Javed, Waqas and Elmqvist, Niklas and Yi, Ji Soo} }