@inproceedings{poupyrev_non-isomorphic_2000, title = {Non-isomorphic 3D {Rotational} {Techniques}}, booktitle = {Proceedings of {CHI}'2000, {ACM}}, author = {Poupyrev, Ivan and Weghorst, Suzanne and Fels, S.}, year = {2000}, pages = {546--547} }