Nielsen, M. P., Braestrup, M. W., Jensen, B. C. and Bach, F. (1978). Concrete plasticity,
                           beam shear - shear in joints - punching shear, Special Publication, Danish Society
                           for Structural Science and Engineering, Lyngby, Denmark.Nielsen, M. P., Braestrup,
                           M. W., Jensen, B. C. and Bach, F. (1978). Concrete plasticity, beam shear - shear
                           in joints - punching shear, Special Publication, Danish Society for Structural Science
                           and Engineering, Lyngby, Denmark.
