Tom Lyche, Knut Mørken. Knot removal for parametric B-spline curves and surfaces. Computer Aided Geometric Design, 4(3):217-230, 1987. [doi]
@article{LycheM87,
title = {Knot removal for parametric B-spline curves and surfaces},
author = {Tom Lyche and Knut Mørken},
year = {1987},
doi = {10.1016/0167-8396(87)90013-6},
url = {http://dx.doi.org/10.1016/0167-8396(87)90013-6},
researchr = {https://researchr.org/publication/LycheM87},
cites = {0},
citedby = {0},
journal = {Computer Aided Geometric Design},
volume = {4},
number = {3},
pages = {217-230},
}