1. Allen A. H. (1988). Reinforced concrete design to BS 8110 . E & FN Spon London U.K.
2. Using Object-Communication for Design Standards Modeling
3. “Code of practice for design of cold formed sections.” BS 5950 Part 5 British Standards Institute London U.K.
4. “Discussion of `A commentary on portal frame design ' by L. J. Morris.” The Struct. Engr. London U.K. 61(6) 181–189.