Thomas Hermann. On the derivatives of second and third degree rational Bézier curves. Computer Aided Geometric Design, 16(3):157-163, 1999. [doi]
@article{Hermann99,
title = {On the derivatives of second and third degree rational Bézier curves},
author = {Thomas Hermann},
year = {1999},
doi = {10.1016/S0167-8396(98)00037-5},
url = {http://dx.doi.org/10.1016/S0167-8396(98)00037-5},
researchr = {https://researchr.org/publication/Hermann99},
cites = {0},
citedby = {0},
journal = {Computer Aided Geometric Design},
volume = {16},
number = {3},
pages = {157-163},
}