Liu, Yang; Wang, Wenping, A Revisit to Least Squares Orthogonal Distance Fitting of Parametric Curves and Surfaces, Chen, F.; Juttler, B. (编), Advances in Geometric Modeling and Processing, Lecture Notes in Computer Science 4975: 384–397, 2008, CiteSeerX 10.1.1.306.6085, ISBN 978-3-540-79245-1, doi:10.1007/978-3-540-79246-8_29
Liu, Yang; Wang, Wenping, A Revisit to Least Squares Orthogonal Distance Fitting of Parametric Curves and Surfaces, Chen, F.; Juttler, B. (编), Advances in Geometric Modeling and Processing, Lecture Notes in Computer Science 4975: 384–397, 2008, CiteSeerX 10.1.1.306.6085, ISBN 978-3-540-79245-1, doi:10.1007/978-3-540-79246-8_29