Surface of constant width

Curve of constant width - Wikipedia

Reuleaux tetrahedron - Wikipedia

Solids of Constant Width : 21 Steps (with Pictures) - Instructables

Activity 1-11: Curves of Constant Width - ppt download

ag.algebraic geometry - Algebraic surface of constant width? - MathOverflow

Smooth Curves of Constant width and Transnormality

differential geometry - Can the construction of this 2D Curve of Constant Width be adapted to a 3D Surface of Constant Width? - Mathematics Stack Exchange

Various curves of constant width — Geometric Models Collection of V.N. Karazin Kharkiv National University

Curves and Surfaces of Constant Width - Wolfram Demonstrations Project