Thomas W. Sederberg. Point and tangent computation of tensor product rational Bézier surfaces. Computer Aided Geometric Design, 12(1):103-106, 1995. [doi]
@article{Sederberg95,
title = {Point and tangent computation of tensor product rational Bézier surfaces},
author = {Thomas W. Sederberg},
year = {1995},
doi = {10.1016/0167-8396(94)00029-R},
url = {http://dx.doi.org/10.1016/0167-8396(94)00029-R},
researchr = {https://researchr.org/publication/Sederberg95},
cites = {0},
citedby = {0},
journal = {Computer Aided Geometric Design},
volume = {12},
number = {1},
pages = {103-106},
}