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