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Issue No. 05 - September/October (1989 vol. 9)
ISSN: 0272-1716
pp: 48-56
<p>The article was motivated by J. Blinn's column on the many ways to draw a circle (see ibid., vol.7, no.8, p.39-44, 1987). The authors have found several other ways to represent the circle as a nonuniform rational B-spline curve, which they present. Square-based methods, infinite control points, triangle-based methods, general circular arcs and rational cubic circles are some of the methods and types of circle discussed.</p>

L. Piegl and W. Tiller, "A Menagerie of Rational B-Spline Circles," in IEEE Computer Graphics and Applications, vol. 9, no. , pp. 48-56, 1989.
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