1. Nielsen M. P.On the Strength of Reinforced Concrete Discs, Ingeniorakademi Bygninsafdelingen, Aalborg, Denmark, 254, Bulletin No. B2, 1971. Reprinted from: Acta Polytechnica Scandinavica, Civil Engineering and Building Construction Series, 1969, No. 70, (Quoted by Clark4).
2. Nielsen M. P.Optimum Design of Reinforced Concrete Shells and Slabs, 1974, Structural Research laboratory, Technical University of Denmark: 190–200, Report NR.R44.
3. The provision of tension and compression reinforcement to resist in-plane forces
4. OPTIMUM REINFORCEMENT OF CONCRETE SLAB ELEMENTS.