@inproceedings{g2005nl,
title = {3D Screen-space Widgets for Non-linear Projection},
author = {Leon Barrett and Patrick Coleman and Nisha Sudarsanam and Karan Singh and Cindy Grimm},
booktitle = {Graphite},
publisher = {ACM},
note = {This paper lets the user specify multiple cameras using screen-space widgets.},
month = {November},
year = {2005}
}