1. Minimum Bending Radii for Square & Rectangular Hollow Sections (3-roller Cold Bending), CIDECT Report 11C-88/14;Kennedy,1988
2. Determination of Minimum Radii for Cold Bending of Square and Rectangular Hollow Structural Sections, CIDECT Report 11B-78/12;Brady,1978
3. Deformations of Hollow Structural Sections Subjected to Cold Bending, CIDECT Report 11Bt-85/2;Kennedy,1985
4. Eurocode 3: Design of steel structures – part 1–1: General rules and rules for buildings;CEN. EN 1993-1-1,2005
5. Design of Curved Steel;King,2001