1. AS1250‐1981 Steel Structures Code Standards Association of Australia Sydney Australia 1981.
2. B/20 Draft Specification for the Use of Structural Steel in Buidlings British Standards Institution London England 1977.
3. Distortional Buckling of I-Beams
4. BS449: 1969 Specification for the Use of Structural Steel in Buildings British Standards Institution London England 1969.