@inproceedings{134036,
 author = "William M. Hsu and John F. Hughes and Henry Kaufman",
 title = "Direct manipulation of free-form deformations",
 booktitle = "SIGGRAPH '92: Proceedings of the 19th annual conference on Computer graphics and interactive techniques",
 year = "1992",
 isbn = "0-89791-479-1",
 pages = "177--184",
 doi = "http://doi.acm.org/10.1145/133994.134036",
 publisher = "ACM Press",
 address = "New York, NY, USA",
 }