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Thomas W. Sederberg, Jianmin Zheng, Almaz Bakenov, Ahmad Nasri: T-Splines and T-NURCCS, from ACM Trans. Graph. (SIGGRAPH 2003)
"Autodesk Acquires T-Splines Modeling Technology Assets". 22 December 2011. http://www.businesswire.com/news/home/20111222005259/en/Autodesk-Acquires-T-Splines-Modeling-Technology-Assets
US7274364B2, Sederberg, Thomas W., "System and method for defining T-spline and T-NURCC surfaces using local refinements", issued 2007-09-25
https://patents.google.com/patent/US7274364B2/en